Helicopter Drones on Mars

Mars helicopter drone
A small drone helicopter currently being developed by engineers at NASA's Jet Propulsion Laboratory could serve as a reconnaissance scout for future Mars rovers, greatly enhancing their effectiveness. Credit NASA JPL

NASA’s Jet Propulsion Laboratory recently announced that it is developing a small drone helicopter to scout the way for future Mars rovers. Why would Mars rovers need such a robotic guide? The answer is that driving on Mars is really hard.

Here on Earth, robots exploring volcanic rims, or assisting rescuers, can be driven by remote control, with a joystick. This is because radio signals reach the robot from its control center almost instantly. Driving on the moon isn’t much harder. Radio signals traveling at the speed of light take about two and half seconds to make the round trip to the moon and back. This delay isn’t long enough to seriously interfere with remote control driving. In the 1970’s Soviet controllers drove the Lunokhod moon rovers this way, successfully exploring more than 40 km of lunar terrain.

Driving on Mars is much harder, because it is so much further away. Depending on its position with respect to Earth, signals can take between 8 and 42 minutes for the round trip. Pre-programmed instructions must be sent to the rover, which it then executes on its own. Each Martian drive takes hours of careful planning. Stereo images taken by the rover’s navigation cameras are carefully scrutinized by engineers. Images from spacecraft orbiting Mars sometimes provide additional information.

A rover can be programmed either to simply execute a list of driving commands sent from Earth, or it can use images taken by its navigation cameras and processed by its on-board computers to measure speed and detect obstacles or hazards by itself. It can even plot its own safe path to a specified goal. Drives based on instructions from the ground are the fastest.

The Mars Exploration Rovers Spirit and Opportunity could drive up to 124 meters in an hour this way. This corresponds to about the length of an American football field. But this mode was also the least safe.

When the rover actively guides itself with its cameras, progress is safer, but much slower because of all the image processing needed. It may progress by as little as 10 meters an hour, which is about the distance from the goal line to the 10 yard line on an American football field. This method must be used whenever the rover doesn’t have a clear view of the route ahead, which is often the case due to rough and hilly terrain.

As of early 2015, the farthest Curiosity has driven in a single day is 144 meters. Opportunity’s longest daily drive was 224 meters, a distance the length of two American football fields.

If ground controllers could get a better view of the path ahead, they could devise instructions allowing a future rover to safely drive much further in a day.

That’s where the idea of a drone helicopter comes in. The helicopter could fly out ahead of the rover every day. Images made from its aerial vantage point would be invaluable to ground controllers for identifying points of scientific interest, and planning driving routes to get there.

Flying a helicopter on Mars poses special challenges. One advantage is that Martian gravity is only 38% as strong as that of Earth, so that the helicopter wouldn’t need to generate as much lift as one of the same mass on Earth. A helicopter’s propeller blades generate lift by pushing air downward. This is harder to do on Mars than on Earth, because the Martian atmosphere is on hundred times thinner. To displace enough air, the propeller blades would need to spin very quickly, or to be very large.

The copter must be capable of flying on its own, using prior instructions, maintaining stable flight along a pre-specified route. It must land and take off repeatedly in rocky Martian terrain. Finally it must be capable of surviving the harsh conditions of Mars, where the temperature plummets to 100 degrees Fahrenheit or lower every night.

The JPL engineers designed a copter with a mass of 1 kilogram; a tiny fraction of the 900 kg mass of the Curiosity rover. Its propeller blades span 1.1 meters from blade tip to blade tip, and are capable of spinning at 3400 rotations per minute. The body is about the size of a tissue box.

The copter is solar powered, with a disk of solar cells gathering enough power every day to power a flight of two to three minutes and to heat the vehicle at night. It can fly about half a kilometer in that time, gathering images for transmission to ground control as it goes. Engineers expect that the reconnaissance that the drone copter gathers will be invaluable in planning a rover’s drives, tripling the distance that can be traveled in a day.

References and further reading:
Thanks to Mark Maimone of NASA Jet Propulsion Laboratory for information about the daily driving distances of Curiosity and Opportunity.

J.J. Biesiadecki, P. C. Leger, and M.W. Maimone (2007), ‘tradeoffs between directed and autonomous driving on the Mars exploration rovers’, The International Journal of Robotics Research, 26(1), 91-104

E. Howell, Opportunity Mars rover treks past 41 kilometers towards ‘Marathon Valley’, Universe Today, Dec. 2014.

T. Reyes, An incredible journey, Mars Curiosity rover reaches base of Mount Sharp. Universe Today, Sept. 2014.

Helicopter could be ‘scout’ for Mars rovers. NASA Jet Propulsion Laboratory Press release. January 22, 2015.

Crazy Engineering: The Mars helicopter. NASA Jet Propulsion Laboratory video.

Curiosity- Mars Science Laboratory, NASA.

Mars- Future rover plans. NASA

Slender Moonspotting, Occultations, Daytime Planets and More

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One of nature’s grandest ‘occultations’ of all is coming right up this Friday, as the Moon passes in front of the Sun for viewers in the high Arctic for a total solar eclipse. And although 99.999+% percent of humanity will miss totality, everyone can trace the fascinating path of the Moon as it moves back into the evening sky this weekend.

As of this writing, it looks like the fickle March weather is going to keep us guessing right up to eclipse day. Fear not, as the good folks over at the Virtual Telescope Project promise to bring us views of the eclipse live.  Not only does this eclipse fall on the same day as the start of astronomical spring in the northern hemisphere known as the vernal (northward) equinox, but it also marks the start of lunation 1141.

Ever try hunting for the slender crescent Moon in the dawn or dusk sky? The sport of thin Moon-spotting on the days surrounding the New Moon can push visual skills to the very limit. Binoculars are your friend in this endeavor, as you sweep back and forth attempting to see the slim fingernail of a Moon against the low contrast background sky.  Thursday morning March 19th provides a great chance for North American observers to spy an extremely thin Moon about 24 hours prior to Friday’s eclipse.

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Projected locales for the first sightings of the slim crescent Moon on the evening of March 20th. Credit: Created by author.

Unfortunately, most of North America misses the eclipse, though folks on the extreme east coast of Newfoundland might see a partially eclipsed sunrise if the day dawns clear.

The Moon will first be picked up in the evening sky post-eclipse this weekend. On Friday evening, folks in the southern United States might just be able to spy a 15 hour old Moon with optical assistance if skies are clear.

As the Moon fattens, expect to see it at its most photogenic as Ashen light or Earthshine illuminates its nighttime side. What you’re seeing is sunlight from the Earth being reflected back in a reverse (waning gibbous) phase as seen from the earthward side of the Moon. The prominence of Earthshine can vary depending on the amount of cloud and snow cover currently turned moonward, though of course, if it’s cloudy from your location, you won’t see a thing…

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The universe smiles back: A skewed emoticon grouping of Venus, Mars and the Moon plus Earthshine on February 20th. Photo by author.

Watch that Moon over the coming weeks, as it has a date with destiny.

The Moon occults (passes in front of) two planets and one bright star in the coming week. First up is an occultation of Uranus on March 21st at around 11:00 UT/7:00 AM EDT. Sure, this one is for the most part purely academic and unobservable, as it occurs over central Africa in the daytime and is only 15 degrees east of the Sun. Still, if you can pick up the Moon on the evenings of March 20th or March 21st, you might just be able to spy nearby Uranus shining at +6th magnitude nearby before it heads towards solar conjunction on April 6th.

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The visibility footprint of the March 21st occultation of Mars by the Moon. Credit: Occult 4.1.

Next, the Moon occults Mars on March 21st at 22:00 UT/6:00 PM EDT for the southern Pacific coast of South America. North America will see an extremely close photogenic pairing of Luna and the Red Planet. This is one of seven occultations of a naked eye planet by the Moon for 2015, and the first of two for Mars for the year, the next falling on December 6th.

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The Moon pairs with Venus on the evening of March 22nd. Credit: Stellarium.

Next up, the Moon has a tryst with brilliant Venus, passing 2.8 degrees from the Cytherean world on March 22nd. Can you spy -4th magnitude Venus near the two day old Moon before sunset? This is the stuff that has inspired astronomically-themed flags and skewed emoticon ‘smiley face conjunctions’ of yore, including the close pairing of Mars, Venus and the Moon seen worldwide last month.

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The occultation of Aldebaran by the Moon on March 25th. Credit: Occult 4.1.

Next up, the 30% illuminated Moon occults the bright star Aldebaran for Alaskan viewers at dusk on March 25th. This is the third occultation of the star by the Moon in the ongoing cycle, and to date, no one has, to our knowledge, successfully caught an occultation of Aldebaran in 2015… could this streak be broken next week?

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The daytime Moon paired with Jupiter on March 30th. Credit: Starry Night Education software.

And speaking of daytime planet-spotting, Jupiter will sit only five degrees south of the waxing gibbous Moon on the evening of March 30th. Can you spy the giant planet near the daytime Moon in the afternoon sky using binocs? And finally, watch that Moon, as it heads for the third total lunar eclipse of the last 12 months visible from the Americas and the Pacific region on the morning of April 4th

More to come!

World’s Most Powerful Solid Booster Set for Space Launch System Test Firing on March 11

Orbital ATK’s five segment rocket motor is assembled in its Promontory, Utah, test stand where it is being conditioned for the March 11 ground test. Credit: Orbital ATK

All systems are go for the inaugural ground test firing on March 11 of the world’s most powerful solid rocket booster ever built that will one day power NASA’s mammoth new Space Launch System (SLS) heavy lift rocket and propel astronauts to deep space destinations.

The booster known as qualification motor, QM-1, is the largest solid rocket motor ever built and will be ignited on March 11 for a full duration static fire test by prime contractor Orbital ATK at the newly merged firms test facility in Promontory, Utah.

Ignition of the horizontally mounted motor is planned for 11:30 a.m. EDT (9:30 a.m. MDT) on Wednesday, March 11 on the T-97 test stand.

The test will be broadcast live on NASA TV.

Engineers at Orbital ATK in Promontory, Utah, prepare to test the booster that will help power NASA’s Space Launch System to space to begin missions to deep space, including to an asteroid and Mars. A test on March 11 is one of two that will qualify the booster for flight.  Image Credit:  Orbital ATK
Engineers at Orbital ATK in Promontory, Utah, prepare to test the booster that will help power NASA’s Space Launch System to space to begin missions to deep space, including to an asteroid and Mars. A test on March 11 is one of two that will qualify the booster for flight. Image Credit: Orbital ATK

The two minute long, full duration static test firing of the motor marks a major milestone in the ongoing development of NASA’s SLS booster, which is the most powerful rocket ever built in human history.

The 5-segment booster produces 3.6 million lbs of maximum thrust which equates to more than 14 Boeing 747-400s at full takeoff power!

The new 5-segment booster is directly derived from the 4-segment booster used during NASA’s three decade long Space Shuttle program. One segment has been added and therefore the new, longer and more powerful booster must be requalified to launch the SLS and humans.

A second test is planned a year from now and will qualify the boosters for use with the SLS.

Teams of engineers, operators, inspectors and program managers across Orbital ATK’s Flight Systems Group have spent months getting ready for the QM-1 test. To prepare they started countdown tests on Feb 25.

“The crew officially starts daily countdown test runs of the systems this week, at T-15 days,” said Kevin Rees, director, Test & Research Operations at Orbital ATK.

“These checks, along with other test stand calibrations, will verify all systems are ready for the static test. Our team is prepared and we are proud to play such a significant role on this program.”

The first qualification motor for NASA's Space Launch System's booster is installed in ATK's test stand in Utah and is ready for a March 11 static-fire test.   Credit:  ATK
The first qualification motor for NASA’s Space Launch System’s booster is installed in ATK’s test stand in Utah and is ready for a March 11 static-fire test. Credit: ATK

The QM-1 booster is being conditioned to 90 degrees and the static fire test will qualify the booster design for high temperature launch conditions. It sits horizontally in the test stand and measures 154 feet in length and 12 feet in diameter and weighs 801 tons.

The static fire test will collect data on 103 design objectives as measured through more than 534 instrumentation channels on the booster it is firing.

The second booster test in March 2016 will be conducted at lower temperature to qualify the lower end of the launch conditions at 40 degrees F.

The first stage of the SLS will be powered by a pair of the five-segment boosters and four RS-25 engines that will generate a combined 8.4 million pounds of liftoff thrust.

The SLS is designed to propel the Orion crew capsule to deep space destinations, including the Moon, asteroids and the Red Planet.

The maiden test flight of the SLS is targeted for no later than November 2018 and will be configured in its initial 70-metric-ton (77-ton) version with a liftoff thrust of 8.4 million pounds. It will boost an unmanned Orion on an approximately three week long test flight beyond the Moon and back.

NASA plans to gradually upgrade the SLS to achieve an unprecedented lift capability of 130 metric tons (143 tons), enabling the more distant missions even farther into our solar system.

The first SLS test flight with the uncrewed Orion is called Exploration Mission-1 (EM-1) and will launch from Launch Complex 39-B at the Kennedy Space Center.

Solid rocket boosters separate from SLS core stage in this artists concept. Credit: NASA
Solid rocket boosters separate from SLS core stage in this artists concept. Credit: NASA

Orion’s inaugural mission dubbed Exploration Flight Test-1 (EFT) was successfully launched on a flawless flight on Dec. 5, 2014 atop a United Launch Alliance Delta IV Heavy rocket Space Launch Complex 37 (SLC-37) at Cape Canaveral Air Force Station in Florida.

Orion’s inaugural mission dubbed Exploration Flight Test-1 (EFT) was successfully launched on a flawless flight on Dec. 5, 2014 atop a United Launch Alliance Delta IV Heavy rocket Space Launch Complex 37 (SLC-37) at Cape Canaveral Air Force Station in Florida.

NASA’s first Orion spacecraft blasts off at 7:05 a.m. atop United Launch Alliance Delta 4 Heavy Booster at Space Launch Complex 37 (SLC-37) at Cape Canaveral Air Force Station in Florida on Dec. 5, 2014.   Launch pad remote camera view.   Credit: Ken Kremer - kenkremer.com
NASA’s first Orion spacecraft blasts off at 7:05 a.m. atop United Launch Alliance Delta 4 Heavy Booster at Space Launch Complex 37 (SLC-37) at Cape Canaveral Air Force Station in Florida on Dec. 5, 2014. Launch pad remote camera view. Credit: Ken Kremer – kenkremer.com

Stay tuned here for Ken’s continuing Earth and Planetary science and human spaceflight news.

Ken Kremer

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Learn more about MMS, Mars rovers, Orion, SpaceX, Antares, NASA missions and more at Ken’s upcoming outreach events:

Mar 9-11: “MMS, Orion, SpaceX, Antares, Curiosity Explores Mars,” Kennedy Space Center Quality Inn, Titusville, FL, evenings

NASA Administrator Charles Bolden officially unveils world’s largest welder to start construction of core stage of NASA's Space Launch System (SLS) rocket at NASA Michoud Assembly Facility, New Orleans, on Sept. 12, 2014. SLS will be the world’s most powerful rocket ever built.  Credit: Ken Kremer - kenkremer.com
NASA Administrator Charles Bolden officially unveils world’s largest welder to start construction of core stage of NASA’s Space Launch System (SLS) rocket at NASA Michoud Assembly Facility, New Orleans, on Sept. 12, 2014. SLS will be the world’s most powerful rocket ever built. Credit: Ken Kremer – kenkremer.com

Mars Loses an Ocean But Gains the Potential for Life

NASA scientists have determined that a primitive ocean on Mars held more water than Earth's Arctic Ocean and that the Red Planet has lost 87 percent of that water to space. Credit: NASA/GSFC

It’s hard to believe it now looking at Mars’ dusty, dessicated landscape that it once possessed a vast ocean. A recent NASA study of the Red Planet using the world’s most powerful infrared telescopes clearly indicate a planet that sustained a body of water larger than the Earth’s Arctic Ocean.

If spread evenly across the Martian globe, it would have covered the entire surface to a depth of about 450 feet (137 meters). More likely, the water pooled into the low-lying plains that cover much of Mars’ northern hemisphere. In some places, it would have been nearly a mile (1.6 km) deep. 

Three of the best infrared observatories in the world were used to study normal to heavy water abundances in Mars atmosphere, especially the polar caps, to create a global map of the planet's water content and infer an ancient ocean. Credit: NASA/ GSFC
Three of the best infrared observatories in the world were used to study normal to heavy water abundances in Mars atmosphere, especially the polar caps, to create a global map of the planet’s water content and infer an ancient ocean. Credit: NASA/ GSFC

Now here’s the good part. Before taking flight molecule-by-molecule into space, waves lapped the desert shores for more than 1.5 billion years – longer than the time life needed to develop on Earth. By implication, life had enough time to get kickstarted on Mars, too.

A hydrogen atom is made up of one proton and one electron, but its heavy form, called deuterium, also contains a neutron. HDO or heavy water is rare compared to normal drinking water, but being heavier, more likely to stick around when the lighter form vaporizes into space. Credit: NASA/GFSC
A hydrogen atom is made up of one proton and one electron, but its heavy form, called deuterium, also contains a neutron. HDO or heavy water is rare compared to normal drinking water, but being heavier, more likely to stick around when the lighter form vaporizes into space. Credit: NASA/GFSC

Using the three most powerful infrared telescopes on Earth – the W. M. Keck Observatory in Hawaii, the ESO’s Very Large Telescope and NASA’s Infrared Telescope Facility – scientists at NASA’s Goddard Space Flight Center studied water molecules in the Martian atmosphere. The maps they created show the distribution and amount of two types of water – the normal H2O version we use in our coffee and HDO or heavy water, rare on Earth but not so much on Mars as it turns out.

Maps showing the distribution of H20 and HDO across the planet made with the trio of infrared telescopes. Credit: NASA/GSFC
Maps showing the distribution of H20 and HDO (heavy water) across the planet made with the trio of infrared telescopes. Credit: NASA/GSFC

In heavy water, one of the hydrogen atoms contains a neutron in addition to its lone proton, forming an isotope of hydrogen called deuterium. Because deuterium is more massive than regular hydrogen, heavy water really is heavier than normal water just as its name implies. The new “water maps” showed how the ratio of normal to heavy water varied across the planet according to location and season. Remarkably, the new data show the polar caps, where much of Mars’ current-day water is concentrated, are highly enriched in deuterium.

It's thought that
It’s thought that the decay of Mars’ once-global magnetic field, the solar wind stripped away much of the planet’s early, thicker atmosphere, allowing solar UV light to break water molecules apart. Lighter hydrogen exited into space, concentrating the heavier form. Some of the hydrogen may also departed due to the planet’s weak gravity. Credit: NASA/GSFC

On Earth, the ratio of deuterium to normal hydrogen in water is 1 to 3,200, but at the Mars polar caps it’s 1 to 400.  Normal, lighter hydrogen is slowly lost to space once a small planet has lost its protective atmosphere envelope, concentrating the heavier form of hydrogen. Once scientists knew the deuterium to normal hydrogen ratio, they could directly determine how much water Mars must have had when it was young. The answer is A LOT!

Goddard scientists estimate that only 13% of Mars' original water reserves are still around today, concentrated in the icy polar caps. The rest took off for space. Credit: NASA/GSFC
Goddard scientists estimate that only 13% of Mars’ original water reserves are still around today, concentrated in the icy polar caps. The rest took off for space. Credit: NASA/GSFC

Only 13% of the original water remains on the planet, locked up primarily in the polar regions, while 87% of the original ocean has been lost to space. The most likely place for the ocean would have been the northern plains, a vast, low-elevation region ideal for cupping huge quantities of water. Mars would have been a much more earth-like planet back then with a thicker atmosphere, providing the necessary pressure, and warmer climate to sustain the ocean below.

Mars at the present time has little to no liquid water on its cold, desert-like surface. Long ago, the Sun saw its reflection from wave-rippled lakes and a northern ocean. Credit: NASA/GSFC
Mars at the present time has little to no liquid water on its cold, desert-like surface. Long ago, the Sun almost certainly saw its reflection from wave-rippled lakes and a northern ocean. Credit: NASA/GSFC

What’s most exciting about the findings is that Mars would have stayed wet much longer than originally thought. We know from measurements made by the Curiosity Rover that water flowed on the planet for 1.5 billion years after its formation. But the new study shows that the Mars sloshed with the stuff much longer. Given that the first evidence for life on Earth goes back to 3.5 billion years ago – just a billion years after the planet’s formation – Mars may have had time enough for the evolution of life.

So while we might bemoan the loss of so wonderful a thing as an ocean, we’re left with the tantalizing possibility that it was around long enough to give rise to that most precious of the universe’s creations – life.

To quote Charles Darwin: “… from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.

Illustration showing Mars evolving from a wet world to the present-day Red Planet. Credit: NASA/GSFC
Illustration showing Mars evolving from a wet world to the present-day where liquid water can’t pond on its surface without vaporizing directly into the planet’s thin air. As Mars lost its atmosphere over billions of years, the remaining water, cooled and condensed to form the north and south polar caps. Credit: NASA/GSFC

The Night Mars Was Closest to Earth

On Earth, Don Parker’s Mars images were hard to beat, but the Hubble Space Telescope—six times larger than his 16-inch ‘scope and, more importantly, above the atmosphere—easily pulled it off. In this pair of images taken around the time of the planet’s closest approach in 2003, the giant volcano Olympus Mons is the small, bright circular feature above center. Image courtesy Andrew Chaikin.

Editor’s note: On August 27, 2003 Mars was closer to Earth than at any time in human history. Author Andrew Chaikin asked Universe Today to tell the story of how he was fortunate enough to enjoy the event with Don Parker, a “superb planetary photographer and wonderful guy,” Chaikin wrote. “I first met Don, a retired anesthesiologist from Coral Gables, Florida, several weeks earlier when I journeyed with my telescope to Florida to photograph the Moon passing in front of Mars, an event called an occultation. I’d seen Don’s work for decades in Sky & Telescope magazine, but until the occultation we’d never met. I certainly had never imagined that he would turn out to be as much fun as he was, with a warped, wickedly bawdy sense of humor. Standing under the moon and Mars we bonded, and soon we were making plans for me to come down to his place for the closest approach.”

Don passed away on February 22, 2015. In his memory here’s an excerpt from Chaikin’s book, A Passion for Mars.

Godspeed, Don. See you on Mars.

Don Parker with his 16-inch telescope, which he used to take thousands of superb images of the planets. Photo by Sean Walker.
Don Parker with his 16-inch telescope, which he used to take thousands of superb images of the planets. Photo by Sean Walker.

ON PAPER, Don Parker’s life story is pretty ordinary: Born in 1939, he grew up in an Italian neighborhood in Chicago. He spent a few years in the navy, went to medical school, and ended up living in Florida with his wife, Maureen, and their children, working as an anesthesiologist in a Miami hospital. Looking at his résumé you’d never know about his other life, the one dominated by a lifelong obsession with Mars. By the time he went to see Invaders from Mars and War of the Worlds as a teenager in 1953, he was building his first telescope, a three-inch refractor with lenses from Edmund Scientific and a body made from a stovepipe his dad got for him.

He was subscribing to Sky & Telescope magazine and following the continuing debate over whether the canals on Mars really existed. That was a question that only a handful of professional astronomers cared about, but amateur observers, like the ones whose drawings were printed in the magazine, seemed to be on the case. Parker got serious about observing Mars himself around 1954, when he tried to create a homemade reflector, but failed when he had trouble with the mirror. His aunt Hattie came to the rescue that Christmas by giving him a hundred dollar bill — quite a bit of money in those days — which he used to buy a professionally made eight-inch mirror. With help from his dad, he assembled the new telescope, using pipe fittings for the mounting.

In the summer of 1956, when Mars made its famously close appearance, he was at the eyepiece making drawings of his own, until a dust storm engulfed much of the planet that September, just as Mars came closest to Earth. “Mars looked like a cue ball,” Parker remembers. “There was nothing on it. It was very disappointing for me.” At the time, he thought the problem was with his instrument. “I even took the mirror out of the telescope,” he recalls. “You know,‘What the hell is going on here?’” Only much later, when information on Martian dust storms began to show up in the amateur astronomy literature, did he realize his view had been spoiled by an event happening on Mars.

Gullies on a Martian sand dune in this trio of images from NASA's Mars Reconnaissance Orbiter deceptively resemble features on Earth that are carved by streams of water. However, these gullies likely owe their existence to entirely different geological processes apparently related to the winter buildup of carbon-dioxide frost. Image Credit: NASA/JPL-Caltech/University of Arizona
Gullies on a Martian sand dune in this trio of images from NASA’s Mars Reconnaissance Orbiter deceptively resemble features on Earth that are carved by streams of water. However, these gullies likely owe their existence to entirely different geological processes apparently related to the winter buildup of carbon-dioxide frost. Image Credit: NASA/JPL-Caltech/University of Arizona

By that time Parker was in high school, and soon Martian canals became much less important than more earthly matters. “Football and blondes were my major,” he quips. Then it was off to college, and his telescope sat unused in its wooden shelter in the backyard. When it came time for his internship he convinced his wife, Maureen, that they should move to Florida so he could pursue his interest in scuba diving.

Needless to say he had no time for astronomy then, or during his residency. Then came a stint in the navy, and by the early 1970s he was back in Florida, beginning his career as an anesthesiologist and raising a family. By the time Mars made another close approach in 1973 Parker had brought his telescope down from Chicago; his parents had asked him to take it out of the backyard so they could put in a birdbath, and a few months after that, he remembers, “Maureen said, ‘Can you get that thing out of the garage?’”

He didn’t expect it to do him much good outside, however. The conventional wisdom was that south Florida, with its clouds and frequent storms, was a terrible place to do astronomy. But he found out differently that summer, when he trained his telescope on Mars. “I went, ‘Holy shit.’ It was just absolutely steady. I couldn’t believe it.”

Parker returned to his old practice of making drawings at the eyepiece to record as much detail as possible. He sent some of his work to Charles “Chick” Capen, an astronomer at Arizona’s Lowell Observatory and coordinator of Mars observations for the Association of Lunar and Planetary Observers. Soon he and Capen were in frequent contact, and from him Parker learned about the latest techniques for planetary photography.

In the 1970s that was a time-consuming process; he used professional-grade film ordered directly from Kodak and developed it with special, highly toxic chemicals that had to be laboriously prepared for each session. But that became a part of his life’s routine: off to the hospital in the morning, sailing with Maureen in the afternoon, nights at the telescope, and the rest of the time developing and printing his pictures. Returning to work after a beautiful Florida weekend, he says, “Everybody would come in with a nice tan; I’d come in looking like a bed sheet. Forty-eight hours in the darkroom! People would say, ‘Are you ill?’”

All that effort paid off. Parker’s planetary photos were now appearing frequently in Sky & Telescope. But they still couldn’t record the kind of details a good observer could see at the eyepiece. Soon Chick Capen was steering him, gently, toward more ambitious Martian observing projects—especially the exacting task of monitoring the planet’s north polar ice cap. Using a measuring device called a filar micrometer attached to their telescopes, Parker and fellow amateur Jeff Beish studied the cap as it shrank during the Martian spring and summer. Observations going back to the early years of the twentieth century showed that the north polar cap always shrank at the same predictable rate, but in the 1980s Parker and Beish found a surprise: The cap shrank more quickly, and to a smaller size, than ever before. Years before most people had even heard the term “global warming” (and more than a decade before evidence from NASA’s Mars Global Surveyor mission) Parker and Beish had found evidence that it was taking place on Mars.

Hubble images show cloud formations (left) and the effects of a global dust storm on Mars (Credit: NASA/Hubble)
Hubble images show cloud formations (left) and the effects of a global dust storm on Mars (Credit: NASA/Hubble)

Soon their observations were being reinforced by several kinds of data from other astronomers, a convergence that Parker remembers as tremendously thrilling. “All this stuff began to come together,” Parker says. “The dust storm frequencies, the cloud study frequencies, the polar cap shit. And it’s almost better than sex. And it came in from a lot of different observers, different times. It’s really kind of cool—when you’re in a science and something all of a sudden falls into place that you don’t expect. It’s really neat. Nothing’s better than sex, but it’s close.” His work with Beish and other observers was later published, to Parker’s great satisfaction, in the professional planetary science journal Icarus. For Parker it epitomizes the rewards of all those hours at the eyepiece. “It’s the thrill of the hunt,” he says. “That’s really the only thing that’s kept me going. Taking pretty pictures is fine and fun, but doing that for thirty years, it wears after a while. You’ve taken one pretty picture, you’ve taken them all.”

In the 1990s, though, the pictures started to get really pretty. For the first time, amateurs had access to electronic cameras using charged-coupled devices (CCDs), like the ones in NASA spacecraft and professional observatories. Around 1990 fellow amateur astronomer Richard Berry convinced Parker to invest in one of these new cameras, but he had a tough time getting used to it. “I hooked it up,” he remembers. “I didn’t know what to do with it. I was afraid of it. So I went back to film.”

Don Parker's image of Jupiter and the Great Red Spot, taken in 2012. Credit: Don Parker.
Don Parker’s image of Jupiter and the Great Red Spot, taken in 2012. Credit: Don Parker.

Some months later Berry came for a visit and showed Parker what he’d been missing. They pointed Parker’s sixteen-inch telescope at Jupiter, and when the first image came up on his computer screen, “It was ten times better than anything I’d ever gotten with film. The detail was amazing. It was really exciting.”

Before long Parker had completely switched over to using his electronic imager, and he never looked back. Unlike film, it offered instant gratification; no longer did he have to spend hours in the darkroom before he could see results. Even more important, the extraordinary sensitivity of CCDs allowed much shorter exposure times than film, making it possible to record a planet during those brief moments of good seeing. He could even create remarkably detailed color images by taking separate exposures through red, green, and blue filters, then combining the results in newly developed programs like Adobe Photoshop.

And to Parker’s great relief, electronic images proved as good as visual observations for monitoring Martian features like clouds, dust storms, and— thankfully—the changing polar ice caps. At last, he could put aside the filar micrometer and the tedious hours that went along with it. But there was no way around the fact that the whole experience of planetary observing had changed for serious amateurs like Parker, just as it had for professionals. He realized this during Richard Berry’s visit, as they filled his computer’s hard drive with electronic portraits of Jupiter. “I said to Richard, ‘We’ve been here for six hours and haven’t even looked through the telescope.’ And he said, ‘Yeah, now you’re a real astronomer!’”

August 26, 2003,
Coral Gables, Florida

With no time for a road trip, I’ve packed my webcam and flown to Miami. I arrive at Don Parker’s waterfront home shortly after he has awakened from yet another all-nighter at the telescope. Don is tall, pot bellied, and nearly bald, with a kind of leering, lopsided grin that spreads mischievously across his face. In his old hospital scrubs he reminds me of Peter Boyle in Young Frankenstein. Don wouldn’t mind hearing me say that; he often refers to himself as Mongo, after the character in another Mel Brooks film, Blazing Saddles. (For example: “Mongo got good pictures. Mongo happy.”)

When he was a practicing anesthesiologist he had a penchant for playing crude practical jokes in the O.R. to startle the nurses (the fart machine was a favorite). “It was like MASH,” he says. Now that he is retired there is nothing to stop him from spending every clear night at the telescope—and that is what he does, whenever Mars shines overhead. Back in 1984, when the seeing was even better than it is now, he and Jeff Beish logged 285 nights of making drawings, photos, and micrometer measurements. Parker says, “We were praying for rain. Going to the Seminole reservation to pay the guys to do a rain dance.” Two decades later, his “other life” has become his life. For months now, as Mars has grown from an orange speck in the predawn sky to its current brilliance, high overhead at midnight, Don has faithfully recorded its changing aspect, the shrinking polar cap, the comings and goings of blue hazes and yellow dust clouds, the parade of deserts and dark markings. Maureen is now a full-fledged Mars widow. Don calls it “The Curse of the Red Planet.”

For me this is the big night, and I am full of anticipation. About twelve hours from now, at 5:51am Eastern Daylight Time on August 27, Mars will be 34,646,418 million miles away from Coral Gables. An astronomer at JPL has figured out that this is closer than at any time since the year 57617 B.C., and closer than Mars will be again until the year 2287. For Don, though, this is just one more night in an unbroken string of nights that began last April and will continue into next spring. Don, of course, is far from the only one so afflicted. At any given moment this summer someone around the world is observing Mars, including a couple of twenty-something wizards in Hong
Kong and Singapore who are getting spectacular results with telescopes placed on their high-rise apartment balconies (when I mention them Don curses ruefully, then laughs).

Sitting in Don’s kitchen, we discuss the weather for the coming night— the continuing hurricane season has made things a bit iffy—as he mixes his standard brew of freeze-dried coffee, sugar, and nondairy creamer, a concoction that seems less like a beverage than a research project in polymer chemistry. Arthritis and weakening of the bones in his legs have left him with a limp so painful that he must use a cane, and as he leads me to his upstairs office he utters a string of profanities.

Seated at the computer he unveils his most recent images and I am astonished by their clarity. Even back in April, when Mars was a fraction of its current apparent size, Don was getting a remarkable amount of detail. Now his pictures are so good that they hold up in side-by-side comparisons with Mars images from the Hubble Space Telescope. If you know where to look, you can even spot the giant volcano, Olympus Mons.

When I was growing up, even the two-hundred-inch giant at Palomar couldn’t come close to the details Don has recorded with a telescope just sixteen inches in diameter.

By nightfall the sky is mercifully clear, and Don sets up a ten-inch scope for me to use. The view is amazing: The planet’s disc is shaded with subtle, dusky patterns, far more detailed than any previous view of Mars I’ve ever seen. But when I attach the webcam and fire up the laptop, the live video that appears before me is almost too good to be true. Mars is so big, so clear, that I can even see individual dark spots that must be huge, windblown craters, trailing streaks of dark sand across the pink deserts. At the south pole, the retreating ice cap gleams brilliantly, with an outlier of frosted ground distinctly visible adjacent to the larger white mass.

Long into the night, and again the next, Don and I gather our photographic records of this unprecedented encounter, he at one telescope, I at the other. I feel lucky to be alive at this moment, suspended between the time of the Neanderthals and the twenty-third century, when some of our descendants will be on Mars, looking back at Earth. Right now I am face-to-face with Mars in a way I have never been, and never will be again. It is not the Mars of my childhood picture books, or the one revealed by an armada of space probes, or the trackless world where men and women will someday leave footprints. At this moment, I am exploring Mars, and 35 million miles doesn’t seem like much, not much at all.

Andrew Chaikin.
Andrew Chaikin.

Find out more about Chaikin’s books “A Passion for for Mars,” “A Man on the Moon” and more at Chaikin’s website.

No, a Dinosaur Skull Hasn’t Been Found on Mars: Why We See Familiar Looking Objects on the Red Planet

The dinosaur on Mars, the Face in Cydonia, the rat, the human skull, the Smiley face, the prehistoric vertebrae and the conglomerate rock. Something is amiss in this montage and shouldn't be included. (Photo Credits: NASA/JPL)

What is up with the fossils on Mars? Found – a dinosaur skull on Mars? Discovered – a rat, squirrel or gerbil on Mars? In background of images from Curiosity, vertebrae from some extinct Martian species? And the human skull, half buried in photos from Opportunity Rover. All the images are made of stone from the ancient past and this is also what is called Pareidolia. They are figments of our imaginations, and driven by our interest to be there – on Mars – and to know that we are not alone. Altogether, they make a multitude of web pages and threads across the internet.

Is she or isn’t she, a face on the red planet Mars? Discovered in the thousands of photos transmitted to Earth by the Viking orbiter in the 1970s, the arrival of Mars Global Surveyor included Mars Orbiter Camera (MOC) which revealed details that put to rest the face of Cydonia. Actually, it is alive and well for many. (Photo Credits: NASA/JPL- Viking/MGS, GIF – Judy Schmidt)

Rock-hounds and Martian paleontologists, if only amateur or retired, have found a bounty of fascinating rocks nestled among the rocks on Mars. There are impressive web sites dedicated to each’s eureka moment, dissemination among enthusiasts and presentation for discussion.

At left, MSL's Curiosity landed not far from a sight hard to leave - Yellow Knife including sight "John Klein". Inset: this authors speculative thought - mud chips? At right, is Mars enthusiasts' Bone on Mars. (Photo Credits: NASA/JPL, Wikimedia)
At left, MSL’s Curiosity landed not far from a sight hard to leave – Yellow Knife including sight “John Klein”. Inset: this authors speculative thought – mud chips? At right, is Mars enthusiasts’ Bone on Mars. (Photo Credits: NASA/JPL, Wikimedia)

NASA scientists have sent the most advanced robotic vehicles to the surface of Mars, to the most fascinating and diverse areas that are presently reachable with our technology and landing skills. The results have been astounding scientifially but also in terms of mysteries and fascination with the strange, alien formations. Some clearly not unlike our own and others that must be fossil remnants from a bygone era – so it seems.

Be sure to explore, through the hyperlinks, many NASA, NASA affiliates’ and third party websites – embedded throughout this article. Also, links to specific websites are listed at the end of the article.

The Dinosaur skull on Mars is actually dated from Martian Sol 297 (June 7, 2013). The imager used to return this and an historic array of landscapes, close-ups and selfies is the Mars Hand Lens Imager (MAHLI). MSL Curiosity includes the NAVCAM, cameras for navigation, HAZCAM, MASTCAM,and MARDI cameras. Together, the array of images is historic and overwhelming raising more questions than answers including speculative and imaginative "discoveries." (Photo Credit: NASA/JPL)
The Dinosaur skull on Mars is actually dated from Martian Sol 297 (June 7, 2013). The imager used to return this was the MASTCAM and an historic array of landscapes, close-ups and selfies has been produced by the Mars Hand Lens Imager (MAHLI). Other MSL Curiosity cameras are the NAVCAM, cameras for navigation, HAZCAM and MARDI camera. The array of images is historic and overwhelming raising more questions than answers including speculative and imaginative “discoveries.” (Photo Credit: NASA/JPL)

The centerpiece of recent interest is the dinosaur skull protruding from the Martian regolith, teeth still embedded, sparkling efferdent white. There are no sockets for these teeth. Dinosaur dentures gave this senior citizen a few extra good years. The jaw line of the skull has no joint or connection point with the skull. So our minds make up the deficits, fill in the blanks and we agree with others and convince ourselves that this is a fossilized skull. Who knows how this animal could have evolved differently.

But evolve it did – within our minds. Referencing online dictionaries [ref], “Pareidolia is the imagined perception of a pattern (or meaning) where it does not actually exist, as in considering the moon to have human features.” I must admit that I do not seek out these “discoveries” on Mars but I enjoy looking at them and there are many scientists at JPL that have the same bent. Mars never fails to deliver and caters to everyone, but when skulls and fossils are seen, it is actually us catering to the everyday images and wishes we hold in our minds.

No one is left out of the imagery returned from the array of NASA's Martian assets in orbit.  Mars exhibits an incredible display of wind swept sand dunes (center photo). (Photo Credits: NASA, Paramount Pictures)
No one is left out of the imagery returned from the array of NASA’s Martian assets in orbit. Mars exhibits an incredible display of wind swept sand dunes (center photo). (Photo Credits: NASA, Paramount Pictures)

The “Rat on Mars” (main figure, top center) is actually quite anatomically complete and hunkered down, having taken its final gasps of air, eons ago, as some cataclysmic event tore the final vestiges of Earth-like atmosphere off the surface. It died where it once roamed and foraged for … nuts and berries? Surprisingly, no nuts have been found. Blueberries – yes – they are plentiful on Mars and could have been an excellent nutritional source for rats; high in iron and possibly like their Earthly counterpart, high in anti-oxidants.

The Blueberries of Mars are actually concretions of iron rich minerals from water - ground or standing pools - created over thousands of years during periodic epochs of wet climates on Mars. (Photo Credits: NASA/JPL/Cornell)
The Blueberries of Mars are actually concretions of iron rich minerals from water – ground or standing pools – created over thousands of years during periodic epochs of wet climates on Mars. (Photo Credits: NASA/JPL/Cornell)

The blueberries were popularized by Dr. Steve Squyres, the project scientist of the Mars Exploration Rover (MER) mission. Discovered in Eagle crater and across Meridiani Planum, “Blueberries” are spherules of concretions of iron rich minerals from water. It is a prime chapter in the follow-the-water story of Mars. And not far from the definition of Pareidolia, Eagle Crater refers to the incredible set of landing bounces that sent “Oppy” inside its capsule, surrounded by airbags on a hole-in-one landing into that little crater.

When the global dust storm cleared, Mariner 9's fist landfall was the tip of Olympus Mons, 90,000 feet above its base. Two decades later, Mars Global Surveyors laser altimeter data was used to computer generate this image. At left are sand dunes near the north pole were photographed in 2008 by the Mars Reconnaissance Orbiter Camera (MROC). The sand dunes challenge scientists' understanding of Mars' geology and meterology while fueling speculation that such features are plants or trees on Mars. (Photo Credit: NASA/JPL)
When the global dust storm cleared, Mariner 9’s first landfall was the tip of Olympus Mons, 90,000 feet above its base. Two decades later, Mars Global Surveyors laser altimeter data was used to computer generate this image(NASA Solar System Exploration page). At left are sand dunes near the north pole photographed in 2008 (APOD) by the Mars Reconnaissance Orbiter HiRISE camera. The sand dunes challenge scientists’ understanding of Mars’ geology and meterology while fueling speculation that such features are plants or trees on Mars. (Photo Credit: NASA/JPL)

Next, is the face of Mars of the Cydonia region (Images of Cydonia, Mars, NSSDC). As seen in the morphed images, above, the lower resolution Viking orbiter images presented Mars-o-philes clear evidence of a lost civilization. Then, Washington handed NASA several years of scant funding for planetary science, and not until Mars Global Surveyor, was the Face of Cydonia photographed again. The Mars Orbiter Camera from the University of Arizona delivered high resolution images that dismissed the notion of a mountain-sized carving. Nonetheless, this region of Mars is truly fascinating geologically and does not disappoint those in search of past civilizations.

At left, drawings by Italian astronomer Giovanni Schiaparelli coinciding with Mars' close opposition with Earth in 1877. At right, the drawings of Percival Lowell who built the fine observatory in Flagstaff to support his interest in Mars and the search for a ninth planet. H.G. Wells published his book "War of the Worlds" in 1897. (Image Credits: Wikipedia)
At left, drawings by Italian astronomer Giovanni Schiaparelli coinciding with Mars’ close opposition with Earth in 1877. At right, the drawings of Percival Lowell who built the fine observatory in Flagstaff to support his interest in Mars and the search for a ninth planet. H.G. Wells published his book “War of the Worlds” in 1897. (Image Credits: Wikipedia)

And long before the face on Mars in Cydonia, there were the canals of Mars. Spotted by the Mars observer Schiaparelli, the astronomer described them as “channels” in his native language of Italian. The translation of the word turned to “Canals” in English which led the World to imagine that an advanced civilization existed on Mars. Imagine if you can for a moment, this world without Internet or TV or radio and even seldom a newspaper to read. When news arrived, people took it verbatim. Canals, civilizations – imagine how imaginations could run with this and all that actually came from it. It turns out that the canals or channels of Mars as seen with the naked eye were optical illusions and a form of Pareidolia.

So, as our imagery from Mars continues to return in ever greater detail and depth, scenes of pareidolia will fall to reason and we are left with understanding. It might seem sterile and clinical but its not. We can continue to enjoy these fascinating rocks – dinosaurs, rats, skulls, human figures – just as we enjoy a good episode of Saturday Night Live. And neither the science or the pareidolia should rob us of our ability to see the shear beauty of Mars, the fourth rock from the Sun.

Having supported Mars Phoenix software development includin the final reviews of the EDL command sequence, I was keen to watch images arrive from the lander. The image was on a office wall entertaining the appearance of a not-so-tasty junk food item on Mars. (Photo Credit: NASA/JPL/Univ. Arizona, Illustration - T.Reyes)
Having supported Mars Phoenix software development including the final reviews of the EDL command sequence, I was keen to watch images arrive from the lander. The image was on an office wall entertaining the appearance of a not-so-tasty junk food item on Mars. (Photo Credit: NASA/JPL/Univ. Arizona, Illustration – T.Reyes)

In the article’s main image, what should not be included is the conglomerate rock on Mars. NASA/JPL scientists and geologists quickly recognized this as another remnant of Martian hydrologics – the flow of water and specifically, the bottom of a stream bed (NASA Rover Finds Old Streambed on Martian Surface). Truly a remarkable discovery and so similar to conglomerate rocks on Earth.

Favorite Images From Mars Rover Curiosity, NASA/JPL

The BeautifulMars Project: Making Mars Speak Human, University of Arizona

MRO HiRISE, High Resolution Imaging Science Experiment, University of Arizona

Nine Planets, Mars, general information and links to many other sites

Mars Phoenix Lander, University of Arizona web site

Mind-Blowing Beauty of Mars’ Dunes: HiRISE Photo, Discovery Channel

Two Sources of Mars Anomaly Imagery and Discussion: One, Two

25 Years Since Voyager’s ‘Pale Blue Dot’ Images

These six narrow-angle color images were made from the first ever "portrait" of the solar system taken by Voyager 1 on Valentine’s Day on Feb. 14, 1990, which was more than 4 billion miles from Earth and about 32 degrees above the ecliptic. Venus, Earth, Jupiter, and Saturn, Uranus, Neptune are seen in these blown-up images, from left to right and top to bottom. Credit: NASA/JPL-Caltech

A quarter of a century has passed since NASA’s Voyager 1 spacecraft snapped the iconic image of Earth known as the “Pale Blue Dot” that shows all of humanity as merely a tiny point of light.

The outward bound Voyager 1 space probe took the ‘pale blue dot’ image of Earth 25 years ago on Valentine’s Day, on Feb. 14, 1990 when it looked back from its unique perch beyond the orbit of Neptune to capture the first ever “portrait” of the solar system from its outer realms.

Voyager 1 was 4 billion miles from Earth, 40 astronomical units (AU) from the sun and about 32 degrees above the ecliptic at that moment.

The idea for the images came from the world famous astronomer Carl Sagan, who was a member of the Voyager imaging team at the time.

He head the idea of pointing the spacecraft back toward its home for a last look as a way to inspire humanity. And to do so before the imaging system was shut down permanently thereafter to repurpose the computer controlling it, save on energy consumption and extend the probes lifetime, because it was so far away from any celestial objects.

Sagan later published a well known and regarded book in 1994 titled “Pale Blue Dot,” that refers to the image of Earth in Voyagers series.

This narrow-angle color image of the Earth, dubbed "Pale Blue Dot," is a part of the first ever "portrait" of the solar system taken by Voyager 1 on Valentine’s Day on Feb. 14, 1990.  Credit: NASA/JPL-Caltech
This narrow-angle color image of the Earth, dubbed “Pale Blue Dot,” is a part of the first ever “portrait” of the solar system taken by Voyager 1 on Valentine’s Day on Feb. 14, 1990. Credit: NASA/JPL-Caltech

“Twenty-five years ago, Voyager 1 looked back toward Earth and saw a ‘pale blue dot,’ ” an image that continues to inspire wonderment about the spot we call home,” said Ed Stone, project scientist for the Voyager mission, based at the California Institute of Technology, Pasadena, in a statement.

Six of the Solar System’s nine known planets at the time were imaged, including Venus, Earth, Jupiter, and Saturn, Uranus, Neptune. The other three didn’t make it in. Mercury was too close to the sun, Mars had too little sunlight and little Pluto was too dim.

Voyager snapped a series of images with its wide angle and narrow angle cameras. Altogether 60 images from the wide angle camera were compiled into the first “solar system mosaic.”

Voyager 1 was launched in 1977 from Cape Canaveral Air Force Station in Florida as part of a twin probe series with Voyager 2. They successfully conducted up close flyby observations of the gas giant outer planets including Jupiter, Saturn, Uranus and Neptune in the 1970s and 1980s.

Both probes still operate today as part of the Voyager Interstellar Mission.

“After taking these images in 1990, we began our interstellar mission. We had no idea how long the spacecraft would last,” Stone said.

Hurtling along at a distance of 130 astronomical units from the sun, Voyager 1 is the farthest human-made object from Earth.

Solar System Portrait - 60 Frame Mosaic. The cameras of Voyager 1 on Feb. 14, 1990, pointed back toward the sun and took a series of pictures of the sun and the planets, making the first ever "portrait" of our solar system as seen from the outside.   Missing are Mercury, Mars and Pluto Credit:  NASA/JPL-Caltech
Solar System Portrait – 60 Frame Mosaic. The cameras of Voyager 1 on Feb. 14, 1990, pointed back toward the sun and took a series of pictures of the sun and the planets, making the first ever “portrait” of our solar system as seen from the outside. Missing are Mercury, Mars and Pluto. Credit: NASA/JPL-Caltech

Voyager 1 still operates today as the first human made instrument to reach interstellar space and continues to forge new frontiers outwards to the unexplored cosmos where no human or robotic emissary as gone before.

Here’s what Sagan wrote in his “Pale Blue Dot” book:

“That’s here. That’s home. That’s us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. … There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world.”

Stay tuned here for Ken’s continuing Earth and planetary science and human spaceflight news.

Ken Kremer

Nobody Knows What These Mysterious Plumes are on Mars

In the Journal Nature, astronomers deliver an exhaustive study of limited albeit high quality ground-based observations of Mars and come up short. A Martian mystery remains. What caused the extremely high-altitude plumes on Mars? (Credit: Nature, Sánchez-Lavega, A. et al. Feb 16, 2015, Figures 1a, 2)

In March 2012, amateur astronomers began observing unusual clouds or plumes along the western limb of the red planet Mars. The plumes, in the southern hemisphere rose to over 200 kilometers altitude persisting for several days and then reappeared weeks later.

So a group of astronomers from Spain, the Netherlands, France, UK and USA have now reported their analysis of the phenomena. Their conclusions are inconclusive but they present two possible explanations.

Was dust lofted to extreme altitudes or ice crystals transported into space.? Hubble images show cloud formations (left) and the effects of a global dust storm on Mars (Credit: NASA/Hubbble)
Was dust lofted to extreme altitudes or ice crystals transported into space.? Hubble images show cloud formations (left) and the effects of a global dust storm on Mars (Credit: NASA/Hubbble)

Mars and mystery are synonymous. Among Martian mysteries, this one has persisted for three years. Our own planet, much more dynamic than Mars, continues to raise new questions and mysteries but Mars is a frozen desert. Frozen in time are features unchanged for billions of years.

An animated sequence of images taken by Wayne Jaeschke on March 20, 2012 showing the mystery plume over the western limb of the red planet (upper right). South is up in the photo. (Credit: W. Jaeschke)

In March 2012, the news of the observations caught the attention of Universe Today contributing writer Bob King. Reported on his March 22nd 2012 AstroBob blog page, the plumes or clouds were clear to see. The amateur observer, Wayne Jaeschke used his 14 inch telescope to capture still images which he stitched together into an animation to show the dynamics of the phenomena.

ModernDay_Astrophotographer2Now on February 16 of this year, a team of researchers led by Agustín Sánchez-Lavega of the University of the Basque Country in Bilbao, Spain, published their analysis in the journal Nature of the numerous observations, presenting two possible explanations. Their work is entitled: “An Extremely high-altitude plume seen at Mars morning terminator.”

Map from the Mars Global Surveyor of the current magnetic fields on Mars. Credit: NASA/JPL
Map from the Mars Global Surveyor of the current magnetic fields on Mars. Credit: NASA/JPL

The phenomena occurred over the Terra Cimmeria region centered at 45 degree south latitude. This area includes the tiger stripe array of magnetic fields emanating from concentrations of ferrous (iron) ore deposits on Mars; discovered by the Mars Global Surveyor magnetometer during low altitude aerobraking maneuvers at the beginning of the mission in 1998. Auroral events have been observed over this area from the interaction of the Martian magnetic field with streams of energetic particles streaming from the Sun. Sánchez-Lavega states that if these plumes are auroras, they would have to be over 1000 times brighter than those observed over the Earth.

Auroras photographed from The International Space Station. The distinct Manicouagan impact crater is seen in northern Canada. Terrestial aurora exist at altitudes of 100 km (60 miles) (Credit: NASA)
Auroras photographed from The International Space Station. The distinct Manicouagan impact crater is seen in northern Canada. Terrestial aurora exist at altitudes of 100 km (60 miles) (Credit: NASA)

The researchers also state that another problem with this scenario is the altitude. Auroras over Mars in this region have been observed up to 130 km, only half the height of the features. In the Earth’s field, aurora are confined to ionospheric altitudes – 100 km (60 miles). The Martian atmosphere at 200 km is exceedingly tenuous and the production of persistent and very bright aurora at such an altitude seems highly improbable.

The duration of the plumes – March 12th to 23rd, eleven days (after which observations of the area ended) and April 6th to 16th – is also a problem for this explanation. Auroral arcs on Earth are capable of persisting for hours. The Earth’s magnetic field functions like a capacitor storing charged particles from the Sun and some of these particles are discharged and produced the auroral oval and arcs. Over Mars, there is no equivalent capacitive storage of particles. Auroras over Mars are “WYSIWYG” – what you see is what you get – directly from the Sun. Concentrated solar high energy streams persisting for this long are unheard of.

The second explanation assessed by the astronomers is dust or ice crystals lofted to this high altitude. Again the altitude is the big issue. Martian dust storms will routinely lift dust to 60 km, still only one-third the height of the plumes. Martian dust devils will lift particles to 20 km. However, it is this second explanation involving ice crystals – Carbon Dioxide and Water – that the researchers give the most credence. In either instance, the particles must be concentrated and their reflectivity must account for the total brightness of the plumes. Ice crystals would be more easily transported to these heights, and also would be most highly reflective.

The paper also considered the shape of the plumes. The remarkable quality of modern amateur astrophotography cannot be overemphasized. Also the duration of the plumes was considered. By local noon and thereafter they were not observed. Again, the capabilities tendered by ground-based observations were unique and could not be duplicated by the present set of instruments orbiting Mars.

A Martian dust devil roughly 12 miles (20 kilometers) high was captured on Amazonis Planitia region of Mars, March 14, 2012 by the HiRISE camera on NASA's Mars Reconnaissance Orbiter. The plume is little more than three-quarters of a football field wide (70 yards, or 70 meters). (Image credit: NASA/JPL-Caltech/UA)
A Martian dust devil roughly 12 miles (20 kilometers) high was captured on Amazonis Planitia region of Mars, March 14, 2012 by the HiRISE camera on NASA’s Mars Reconnaissance Orbiter. The plume is little more than three-quarters of a football field wide (70 yards, or 70 meters). (Image credit: NASA/JPL-Caltech/UA)

Still too many questions remain and the researchers state that “both explanations defy our present understanding of the Mars’ upper atmosphere.” By March 20th and 21st, the researchers summarized that at least 18 amateur astronomers observed the plume using from 20 to 40 cm telescopes (8 to 16 inch diameter) at wavelengths from blue to red. At Mars, the Mars Color Imager on MRO (MARCI) could not detect the event due to the 2 hour periodic scans that are compiled to make global images.

Of the many ground observations, the researchers utilized two sets from the venerable astrophotographers Don Parker and Daiman Peach. While observations and measurements were limited, the researchers analysis was exhaustive and included modeling assuming CO2, Water and dust particles. The researchers did find a Hubble observation from 1997 that compared favorably with the 2012 events and likewise modeled that event for comparison. However, Hubble results provided a single observation and the height estimate could not be narrowly constrained.

Explanation of these events in 2012 are left open-ended by the research paper. Additional observations are clearly necessary. With increased interest from amateurs and continued quality improvements plus the addition of the Maven spacecraft suite of instruments plus India’s Mars Orbiter mission, observations will eventually be gained and a Martian mystery solved to make way for yet another.

References:

An Extremely High-Altitude Plume seen at Mars’ Morning Terminator, Journal Nature, February 16, 2015

Amateur astronomer photographs curious cloud on Mars, AstroBob, March 22, 2012

Catch a ‘Conjunction Triple Play’ on February 20th as the Moon Meets Venus & Mars

The Moon passes Mars and Venus last month... this week's pass is much closer! (Photo by Author).

Fear not, the chill of late February. This Friday gives lovers of the sky a reason to brave the cold and look westward for a spectacular close triple conjunction of the planets Mars, Venus and the waxing crescent Moon.

This week’s New Moon is auspicious for several reasons.  We discussed the vagaries of the Black Moon of February 2015 last week, and the lunacy surrounding the proliferation of the perigee supermoon. And Happy ‘Year of the Goat’ as reckoned on the Chinese luni-solar calendar, as this week’s New Moon marks the start of the Chinese New Year on February 19th. Or do you say Ram or Sheep? Technical timing for the New Moon is on Wednesday, February 18th at 23:47 UT/6:47 PM EST, marking the start of lunation 1140. The next New Moon on March 20th sees the start of the first of two eclipse seasons for 2015, with a total solar eclipse for the high Arctic. More on that next month!
Continue reading “Catch a ‘Conjunction Triple Play’ on February 20th as the Moon Meets Venus & Mars”

Meet Three People Who Intend to Die on Mars

Jeremias from Mozambique
Jeremias from Mozambique. Credit: Guardian

How badly do you want to go to Mars? So badly that you’re willing to make it a one-way trip. And if you’re lucky, LUCKY, you might get a chance to live out a full life on the surface of the Red Planet – a place that’s totally inhospitable to human life. The risks are enormous, the trip will be difficult, and the unknown challenges of trying to survive on Mars have yet to be discovered.

It baffles the imagination that anyone would be willing to put themselves in that kind of risk, turning their back on their friends and family to die (probably quickly) on an alien world. And yet, more than 200,000 people have applied to the Mars One Project, and 663 candidates have been put on the shortlist. Eventually just 4 people will be packed into a spacecraft and blasted off to the Red Planet in 2018. Once they get there, they’ll need to survive with what they brought with them, and what they can scrounge from the surface of the planet. And then they’ll be joined every 2 years later by another crew of potential colonists.

In this short video, the Guardian profiles three would-be Mars colonists to find out what motivates them to participate in this journey.

On its surface, the idea, of course is crazy. And I’ve been skeptical from the beginning that Mars One is ever going to get off the ground, let alone get humans to the surface of Mars, alive. And even if they do arrive alive, calculations from MIT seem to indicate how they’ll die will be a race between a lack of air, water, food or exposure to radiation.

Dina from Iraq/USA
Dina from Iraq/USA

But I’ve also said on many occasions that human space exploration needs focus on getting humans into space, taking greater and greater steps into the Solar System, pushing the boundaries of what we know how to do. We need to turn the impossible into the possible, and the dangerous into the routine. And it’s great to see organizations like Mars One publicly pushing this agenda forward. If nothing else, this helps encourage the space agencies to realize that their citizens want to see them take on big challenges, and that they’re willing to endure the risks.

Ryan from the United Kingdom
Ryan from the United Kingdom

Elon Musk has stated that the goal for SpaceX is to support the colonization of Mars. This is why he won’t take the company public until the Mars Transportation System is up and running, so it can be unhindered by shareholders who don’t support the longterm goal of colonizing Mars. Considering Musk’s track record so far with SpaceX, Tesla and Solar City, it’s hard to think he’ll fail at anything he really puts his mind to.

Perhaps there will eventually be an alliance between SpaceX and Mars One, to support one another as they send humans on a one way trip to Mars. And maybe, these future astronauts will get to live a long life, until they die on Mars.