Universe Today

May 18, 2013December 23, 2015 by Ken Kremer

Opportunity Mars Rover Blazes Past 40 Year Old Space Driving Record

Opportunity pops a ‘wheelie’ on May 15, 2013 (Sol 3308) and then made history by driving further to the mountain ahead on the next day, May 16 (Sol 3309), to establish a new American driving record for a vehicle on another world. This navcam mosaic shows the view forward to Opportunity’s future destinations of Solander Point and Cape Tribulation along the lengthy rim of huge Endeavour crater spanning 14 miles (22 km) in diameter. Credit: NASA/JPL/Cornell/Kenneth Kremer/Marco Di Lorenzo.

Now more than 9 years and counting into her planned mere 90 day mission to Mars, NASA’s legendary Opportunity rover has smashed past another space milestone and established a new distance driving record for an American vehicle on another world this week.

On Thursday, May 16, the long-lived Opportunity drove another 263 feet (80 meters) on Mars – bringing her total odometry since landing on 24 January 2004 to 22.220 miles (35.760 kilometers) – and broke through the 40 year old driving record set back in December 1972 by Apollo 17 astronauts Eugene Cernan and Harrison Schmitt.

See below our complete map of the 9 Year Journey of Opportunity on Mars.

Cernan and Schmitt visited Earth’s moon on America’s final lunar landing mission and drove their mission’s Lunar Roving Vehicle (LRV-3) 22.210 miles (35.744 kilometers) over the course of three days on the moon’s surface at Taurus-Littrow.

Apollo 17 lunar rover at final resting place. Credit: NASA — Apollo 17 lunar rover at final resting place on the Moon. Lunar module in the background. Credit: NASA

Cernan was ecstatic at the prospect of the Apollo 17 record finally being surpassed.

“The record we established with a roving vehicle was made to be broken, and I’m excited and proud to be able to pass the torch to Opportunity, ” said Cernan to team member Jim Rice of NASA Goddard Space Flight Center, Greenbelt, Md, in a NASA statement.

And Opportunity still has plenty of juice left!

So, although there are no guarantees, one can reasonably expect the phenomenal Opportunity robot to easily eclipse the ‘Solar System World Record’ for driving distance on another world that is currently held by the Soviet Union’s remote-controlled Lunokhod 2 rover. See detailed graphic below.

In 1973, Lunokhod 2 traveled 23 miles (37 kilometers) on the surface of Earth’s nearest neighbor.

Why could Opportunity continue farther into record setting territory ?

Because Opportunity’s handlers back on Earth have dispatched the Martian robot on an epic trek to continue blazing a path forward around the eroded rim of the huge crater named ‘Endeavour’ – where she has been conducting ground breaking science since arriving at the “Cape York” rim segment in mid 2011.

Out-of-this-World Records. This chart illustrates comparisons among the distances driven by various wheeled vehicles on the surface of Earth's moon and Mars. Of the vehicles shown, the NASA Mars rovers Opportunity and Curiosity are still active and the totals for those two are distances driven as of May 15, 2013. Opportunity set the new NASA driving record on May 15, 2013 by traveling 22.220 miles (35.760 kilometers). The international record for driving distance on another world is still held by the Soviet Union's remote-controlled Lunokhod 2 rover, which traveled 23 miles (37 kilometers) on the surface of Earth's moon in 1973. Credit: NASA/JPL-Caltech — Out-of-this-World Records. This chart illustrates comparisons among the distances driven by various wheeled vehicles on the surface of Earth’s moon and Mars. Of the vehicles shown, the NASA Mars rovers Opportunity and Curiosity are still active and the totals for those two are distances driven as of May 15, 2013. Opportunity set the new NASA driving record on May 15, 2013 by traveling 22.220 miles (35.760 kilometers). The international record for driving distance on another world is still held by the Soviet Union’s remote-controlled Lunokhod 2 rover, which traveled 23 miles (37 kilometers) on the surface of Earth’s moon in 1973. Credit: NASA/JPL-Caltech

Opportunity has just now set sail for her next crater rim destination named “Solander Point”, an area about 1.4 miles (2.2 kilometers) away – due south from “Cape York.”

Endeavour Crater is 14 miles (22 km) wide, featuring terrain with older rocks than previously inspected and unlike anything studied before. It’s a place no one ever dared dream of reaching prior to Opportunity’s launch in the summer of 2003 and landing on the Meridiani Planum region in 2004.

Opportunity will blast through the world record milestone held by the Lunokhod 2 rover somewhere along the path to “Solander Point.”

Thereafter Opportunity will rack up ever more miles as the rover continues driving further south to a spot called “Cape Tribulation”, that is believed to hold caches of clay minerals that formed eons ego when liquid water flowed across this region of the Red Planet.

It’s a miracle that Opportunity has lasted so far beyond her design lifetime – 37 times longer than the 3 month “warranty.”

“Regarding achieving nine years, I never thought we’d achieve nine months!” Principal Investigator Prof. Steve Squyres of Cornell University told me recently on the occasion of the rovers 9th anniversary on Mars in January 2013.

“Our next destination will be Solander Point,” said Squyres.

Opportunity was joined on Mars by her younger sister Curiosity, currently exploring the crater floor inside Gale Crater since landing on Aug. 6, 2012.

Curiosity is likewise embarked on a epic trek – towards 3 mile high (5.5 km) Mount Sharp some 6 miles away.

Both rovers Opportunity & Curiosity have discovered phyllosilicates, hydrated calcium sulfate mineral veins and vast evidence for flowing liquid water on Mars. All this data enhances the prospects that Mars could have once supported microbial life forms.

The Quest for Life beyond Earth continues ably with NASA’s Martian sister rovers.

And don’t forget to “Send Your Name to Mars” aboard NASA’s MAVEN orbiter- details here. Deadline: July 1, 2013

Ken Kremer

…………….

Learn more about NASA missions, Opportunity, Curiosity and more at Ken’s upcoming lecture presentation:

June 12: “Send your Name to Mars” and “Antares Rocket Launch from Virginia”; Franklin Institute and Rittenhouse Astronomical Society, Philadelphia, PA, 8 PM.

Traverse Map for NASA’s Opportunity rover from 2004 to 2013 to Record Setting Drive on May 15. This map shows the entire path the rover has driven during more than 9 years and over 3309 Sols, or Martian days, since landing inside Eagle Crater on Jan 24, 2004 to current location heading south from Cape York ridge at the western rim of Endeavour Crater. On May 15, 2013 Opportunity drove 263 feet (80 meters) southward - achieving a total traverse distance on Mars of 22.22 miles (35.76 kilometers) - and broke the driving record by any NASA vehicle that was previously held by the astronaut-driven Apollo 17 Lunar Rover in 1972. Credit: NASA/JPL/Cornell/ASU/Marco Di Lorenzo/Ken Kremer — Traverse Map for NASA’s Opportunity rover from 2004 to 2013 to Record Setting Drive on May 15. This map shows the entire path the rover has driven during more than 9 years and over 3309 Sols, or Martian days, since landing inside Eagle Crater on Jan 24, 2004 to current location heading south from Cape York ridge at the western rim of Endeavour Crater. On May 15, 2013 Opportunity drove 263 feet (80 meters) southward – achieving a total traverse distance on Mars of 22.22 miles (35.76 kilometers) – and broke the driving record by any NASA vehicle that was previously held by the astronaut-driven Apollo 17 Lunar Rover in 1972.
Credit: NASA/JPL/Cornell/ASU/Marco Di Lorenzo/Ken Kremer

View Back at Record-Setting Drive by Opportunity. On the 3,309th Martian day, or sol, of its mission on Mars (May 15, 2013) NASA's Mars Exploration Rover Opportunity drove 263 feet (80 meters) southward along the western rim of Endeavour Crater. That drive put the total distance driven by Opportunity since the rover's January 2004 landing on Mars at 22.220 miles (35.760 kilometers. This exceeded the distance record by any NASA vehicle, previously held by the astronaut-driven Apollo 17 Lunar Rover in 1972. Credit: NASA/JPL-Caltech — View Back at Record-Setting Drive by Opportunity. On the 3,309th Martian day, or sol, of its mission on Mars (May 15, 2013) NASA’s Mars Exploration Rover Opportunity drove 263 feet (80 meters) southward along the western rim of Endeavour Crater. That drive put the total distance driven by Opportunity since the rover’s January 2004 landing on Mars at 22.220 miles (35.760 kilometers. This exceeded the distance record by any NASA vehicle, previously held by the astronaut-driven Apollo 17 Lunar Rover in 1972. Credit: NASA/JPL-Caltech

Soviet Lunokhod-2 lunar rover. Credit: Ria Novosti

May 17, 2013December 23, 2015 by Nancy Atkinson

Comets PANSTARRS and Lemmon Still Linger for Early Morning Views

Comet PANSTARRS as seen in the early morning Arizona skies on May 17, 2013. Credit and copyright: Chris Schur.

The comet show is still not over! Early on May 16, 2013, astrophotographer Chris Schur from central Arizona was able to see two comets at once, Comet PANSTARRS AND Comet Lemmon. “We set up on our 14 foot tall balcony observing pad and was able to get the very low Comet Lemmon as it rose in the eastern sky,” Chris told Universe Today via email. “While PANSTARRS was up high by 2:30am, we had to wait until 3:30 before we could try Lemmon.”

While neither comet was visible to the naked eye, Chris reported that both were seen quite clearly in the 11×80 binoculars. “It was fun to go back and forth rapidly between the two objects to compare,” he said. “While PANSTARRS is now a very low surface brightness wedge shaped object, Lemmon was just a huge ball of light, about two magnitudes brighter.”

Comet Lemmon as seen over central Arizona on May 16, 2013. Credit and copyright: Chris Schur.

If you look carefully you can see the comets are stationary, and the stars are slightly trailed from the motion against the starry background.

“One point Id like to make is that PANSTARRS is currently exhibiting one of the most spectacular anti tails I have ever seen,” Chris said. “I have imaged hundreds of comets but never one with such a long sunward spike. This comet is VERY special.”

When viewed edge on from Earth, the anti tail appears as a spike projecting from the comet’s coma towards the Sun It is geometrically opposite to the other tails: the ion tail and the dust tail.

Thanks to Chris for sharing his great images of these comets!

Want to get your astrophoto featured on Universe Today? Join our Flickr group or send us your images by email (this means you’re giving us permission to post them). Please explain what’s in the picture, when you took it, the equipment you used, etc.

May 17, 2013December 30, 2015 by Nancy Atkinson

This is the new ‘We Are the Explorers’ Video You’ll See at ‘Star Trek: Into Darkness”

Have you seen Star Trek: Into Darkness yet? If so, did you see the NASA-themed trailer, too? A crowd-funded 30-second video called “We Are the Explorers” is debuting at theaters this week, shown before the new Trek film begins. It highlights America’s future in space and is narrated by actor Peter Cullen, the voice of head Transformer Optimus Prime.
Continue reading “This is the new ‘We Are the Explorers’ Video You’ll See at ‘Star Trek: Into Darkness””

May 17, 2013December 23, 2015 by Nancy Atkinson

Super-Bright Explosion Seen on the Moon

A bright flash on the Moon on March 17, 2013 when a boulder-sized asteroid hit the lunar surface.

If you were looking up at the Moon on March 17, 2013 at 03:50:55 UTC, you might have seen one of the brightest “lunar flashes” ever witnessed. And it would have been visible with just the naked eye.

“On March 17, 2013, an object about the size of a small boulder hit the lunar surface in Mare Imbrium,” says Bill Cooke of NASA’s Meteoroid Environment Office. “It exploded in a flash nearly 10 times as bright as anything we’ve ever seen before.”

The scientists estimate that the flash came from a 40 kg meteoroid measuring 0.3 to 0.4 meters wide hitting the Moon, likely traveling about 90,000 km/hr (56,000 mph.) The resulting explosion packed as much punch as 5 tons of TNT.

(FYI, lunar meteors hit the ground with so much kinetic energy that they don’t require an oxygen atmosphere to create a visible explosion. The flash of light comes not from combustion but rather from the thermal glow of molten rock and hot vapors at the impact site.)

The crater could be as wide as 20 meters. The scientists for the Lunar Reconnaissance Orbiter are hoping to image the impact site the next time the spacecraft passes over the area. It should be relatively easy to spot, and lunar scientists are always on the lookout for recent impacts. Additionally, comparing the size of the crater to the brightness of the flash would give researchers a valuable “ground truth” measurement to validate lunar impact models.

Were you observing the Moon that night? Universe Today’s David Dickinson pointed out to me that it is quite possible an amateur could have caught it; however no amateur images have surfaced yet. The Moon would’ve been a waxing crescent and visible to the Pacific region and US West Coast at the time. If you have archived images or video, it might be worth a look. And we’d love to hear from you if you happened to catch anything! NASA said the impact site would have glowed like a 4th magnitude star for about one second.

These false-color frames extracted from the original black and white video show the explosion in progress. At its peak, the flash was as bright as a 4th magnitude star. Credit: NASA

During the past 8 years, Cooke and a team of NASA astronomers have been monitoring the Moon for signs of explosions caused by meteoroids hitting the lunar surface.

Ron Suggs, an analyst at the Marshall Space Flight Center, was the first to notice the March 17th impact in a digital video recorded by one of the monitoring program’s 14-inch telescopes. “It jumped right out at me, it was so bright,” he said.

During the 8 years of observations, the team has found that the flashes on the Moon are more common than anyone expected, with hundreds of detectable impacts occurring every year.

Since the monitoring program began in 2005, NASA’s lunar impact team has detected more than 300 strikes, most orders of magnitude fainter than the March 17th event. Statistically speaking, more than half of all lunar meteors come from known meteoroid streams such as the Perseids and Leonids. The rest are sporadic meteors–random bits of comet and asteroid debris of unknown parentage.
Cooke believes the lunar impact might have been part of a much larger event.

NASA's lunar monitoring program has detected hundreds of meteoroid impacts. The brightest, detected on March 17, 2013, in Mare Imbrium, is marked by the red square. Credit: NASA — NASA’s lunar monitoring program has detected hundreds of meteoroid impacts. The brightest, detected on March 17, 2013, in Mare Imbrium, is marked by the red square. Credit: NASA

“On the night of March 17, NASA and University of Western Ontario all-sky cameras picked up an unusual number of deep-penetrating meteors right here on Earth,” he said. “These fireballs were traveling along nearly identical orbits between Earth and the asteroid belt.”

This means Earth and the Moon were pelted by meteoroids at about the same time.

“My working hypothesis is that the two events are related, and that this constitutes a short duration cluster of material encountered by the Earth-Moon system,” said Cooke.

One of the goals of the lunar monitoring program is to identify new streams of space debris that pose a potential threat to the Earth-Moon system. The March 17th event seems to be a good candidate.

Source: Science@NASA

May 17, 2013December 23, 2015 by David Dickinson

Seeing the Red of ‘La Superba,’ a Magnificent Springtime Carbon Star

Finder chart for La Superba. (Photo by Author).

The Universe can be a very gray place. But this week, we’ll look at a fine example of a class of objects that defies this trend.

Many first time stargazers are surprised when the Trifid or the Orion Nebula fails to exhibit the bright splashy colors seen in Hubble photos. The fault lies not with the Universe, but in our very own eyes.

This is because the light sensitive fovea of our eye has two different types of photoreceptor cells; rods and cones. These act like slow and fast speed film (for those of us old enough to remember actual film!) Under low light conditions, objects have a very black-and-white appearance. It’s only with an increase in brightness that the color receptors in the cone cells of our eye begin to kick in.

One class of stars can induce this effect. They’re known as carbon stars.

A fine example of just such an object rides high in the late spring sky for northern hemisphere observers. This is the variable star Y Canum Venaticorum, also abbreviated as Y CVn or “La Superba” (The magnificent). This name was given to the star by Father Angelo Secchi in the mid-19^th century. It is one of the reddest stars in the sky.

Astronomers gauge the “redness” of a star by measuring its magnitude contrast through a blue and visible (green peaking) filters. This is what is known as its B-V index, and the higher the value, the redder the star.

La Superba has a B-V value of +2.5. For contrast, the familiar orange-red stars Antares and Betelgeuse have a B-V value of +1.83 & +1.85, respectively.

Some other classic carbon stars and their B-V values are;

TX Piscium: +2.5

Herschel’s Garnet Star: +2.35

V Hydrae: +4.5

R Leporis (Hind’s Crimson Star): +2.7

Many of these are also variable stars, and they can appear redder visually near their minimum brightness. In the case of La Superba, it ranges from magnitude +4.8 to +6.3 over a span of 160 days, with a longer super-imposed cycle of about 6 years. We’re just coming off of a peak cycle in late May 2013, and La Superba is easy to spot with binoculars about a third of the way between the brilliant double star Cor Caroli (visited by the Enterprise in the Star Trek: The Next Generation Episode “Allegiance”) and Delta Ursa Majoris.

I’ve shown off carbon stars such as La Superba and Hind’s Crimson Star at public star parties to great effect. They can be an excellent star party “secret weapon” when every other ‘scope down the line is aimed at the Orion nebula.

For a faint constellation, Canes Venatici has lots to offer. One of the best globular clusters in the sky M3 can be found within its borders, as can a handful of decent galaxies. La Superba lies in a rather empty region of the constellation high above the galactic plane. In fact, an area about 15° degrees north of location in the adjoining constellation Ursa Major was picked for the famous Hubble Deep Field image for this very reason.

Burnham’s Celestial Handbook describes La Superba as “one of the reddest of all the naked eye stars, (with) a truly odd and vivid tint in large telescopes.” Astronomer Agnes Clerke described its appearance in 1905 as an “extraordinary vivacity of prismatic rays, separated into dazzling zones of red, yellow, and green by broad spaces of profound obscurity.” (Note: the “spaces” referred to gaps in its spectra).

Through the telescope at low power, we see La Superba as an orange-red ember with shades of white. It’s an easy catch with binoculars, and one of the very few carbon stars that is visible to the naked eye under dark skies. We’d judge that only TX Piscium rivals it in brightness, and only V Hydrae and Hinds appear ruddier. I always like to ask first time observers of colored stars what they see… human eye-brain perception can vary greatly!

The coordinates of La Superba are:

Right Ascension: 12 Hours 45’ 08”

Declination: +45 26’ 25”

La Superba is about 600-800 light years distant. Physically, it is a massive star at three times the mass of our Sun. It’s also a monster in terms of diameter, at four astronomical units in size. If you placed it within our solar system, it would swallow up the orbits of the interior planets out to Mars!

La Superba is thus much less dense than our own Sun, and at a surface temperature of about 2,800K, relatively cool. It is also the brightest “J-type” carbon star in the sky, a rare sub-type characterized by the presence of the isotope carbon-13 in its atmosphere. A carbon star is a sun near the end of its life, accumulating carbon compounds in its outer atmosphere as it fuses heavier elements in one last “hurrah” before shedding its outer layers and forming a white dwarf embedded inside a planetary nebula. Carbon stars are much brighter in the infrared, and we see the very tail end of this absorption in the visible red end of the spectrum. In fact, La Superba is a full 9 magnitudes (nearly 4,000 times) brighter in the near-infrared than in the ultraviolet!

All amazing facts to ponder as we view a star near the end of its career, seeding the cosmos with the very element that makes life possible. Next time you’re out observing, be sure to go “into the red” and check out the fine carbon star!

May 17, 2013December 23, 2015 by Elizabeth Howell

‘Star Trek’ Spaceship Model Soars Into Stratosphere

Dropping out of warp speed could have deadly results. (Image: Paramount Pictures/CBS Studios)

It was billed as the U.S. S. Enterprise’s first “real” flight in space, but the spaceship didn’t get quite that far.

A group of Star Trek fans launched a model of the famed fictional vessel to an altitude of 95,568 feet (29,129 meters) above Canada, or about 18.1 miles (29.1 kilometers), they told media.

The Karman line — a commonly accepted threshold for the edge of space — is at about 62 miles, or 100 kilometers, above sea level.

Still, the high-flying feat made the Canadian group quite happy, even though the ship made a suicidal crash landing at the end of its flight.

“We lost our engines,” said Steve Schnier, a member of the group that set Enterprise aloft with a weather balloon from Stayner, Ontario, in an interview with Canada AM.

“It wasn’t a smooth ride,” Schnier added concerning the ship’s final minutes. “It was moving, at one point, at 117 kilometres [72.7 miles] an hour.”

Enterprise smashed into the water near a Georgian Bay island in an area roughly 2.5 hours’ drive north of Canada’s largest city of Toronto. Searchers found it using a GPS signal.

The launch at the end of April came just weeks before Star Trek: Into Darkness, the next installment of the nearly 50-year-old franchise, zoomed into theaters in Canada and the United States this week. (Read our full review here.)

Weather balloon flights are used in science to collect information about the upper atmosphere. Other amateur groups have had fun using the idea, flying tokens ranging from teddy bears to Lego figurines.

May 16, 2013December 23, 2015 by Nancy Atkinson

How Many Tribbles Will Fit Into Your House?

Captain Kirk with Tribbles, from TOS episode, 'The Trouble with Tribbles.' Via Memory Alpha.

Star Trek: How Many Tribbles Will Fit in Your House?

Oh, those little creatures that are no Tribble at all. If you’re not familiar with these small, non-intelligent lifeforms known for their prodigious reproductive rate, Tribbles (Polygeminus grex) are part of Star Trek lore. And we’ve all got Star Trek on the brain with the opening of the latest movie, Star Trek: Into Darkness (see our review here). So just for fun, here’s something that Nilz Baris would have loved to have access to. Provided by the folks at Movoto, this handy calculator will will tell you a.) not only how many Tribbles will fit into your home, but also, b.) how long it will take them to be fruitful and multiply to fill your home.

And for more fun here’s some estimates of how many Tribbles will fit into various landmarks, both real and imagined:

Empire State Building

Tribbles: 71,153,846
Time: 96 hours

White House

Tribbles: 1,375,000
Time: 72 Hours

Burj Khalifa

Tribbles: 96,342,614
ime: 96 hours

Painted Lady

Tribbles: 57,692
Time: 60

Wayne Manor

Tribbles: 980,769
Time: 72 hours

Millennium Falcon

Tribbles: 1,173,493
Time: 72 hours

May 16, 2013April 26, 2016 by Shannon Hall

Blocking Light Sheds New Light on Exoplanet Atmospheres

Kepler-16b is but one example of an uncanny world. It orbits two suns. Credit: Discovery

Exoplanets are uncanny. Some seem to have walked directly out of the best science-fiction movies. For example, we’ve discovered a planet consisting purely of water (GJ 1214b) and one with two suns (Kepler 16b). Some planets nearly scrape their host stars once every orbit, while others exist in darkness without a host star at all. The field of exoplanet research is moving beyond detecting exoplanets to characterizing them – understanding which molecules are present and if they might possibly harbor life.

A key research element in characterizing these alien worlds is observing their atmospheres. But how exactly do astronomers do this? We can’t simply tug the planet toward us to get a closer look. It’s also incredibly difficult to directly image their atmospheres from afar. Why? Stars are incredibly bright in comparison to their puny, barely reflective, and nearby exoplanets. So a direct image of an exoplanet’s atmosphere seemed out of the question – until recently.

It may be tricky to directly image an exoplanet’s atmosphere, but astronomers always have quite a few tricks up their sleeves. The first one is in mounting an instrument called a coronagraph on your telescope. This instrument blocks out the star’s light, leaving an image of the exoplanet alone. Another trick, known as adaptive optics, is to send a laser beam through the atmosphere. The changes in the laser allow us to monitor changes in the atmosphere, providing corrections to clean and smooth the image.

HR 8799, a large star orbited by four known giant planets, is relatively nearby (remember that ‘nearby’ is an astronomers way of saying that it is still pretty far, or in this case 130 light years away). In 2008, three of the planets were directly imaged using the Gemini and Keck telescopes on Mauna Kea, Hawaii. In 2010, the fourth planet, which was closest to the star and therefore the most difficult to see was directly imaged by the Keck telescope.

Direct image of the HR 8799 system. The star has been blocked and all four planets can clearby be seen. Credit: Oppenheimer et al. 2013

A direct image of an exoplanet’s atmosphere may tell us what color the atmosphere appears to be, and how thick the atmosphere is, but it gives us little more information. We need to know the atmospheric composition – the specific molecules and their abundances that are present within the atmosphere itself. If we’re looking at the question of habitability we need to know if there is water in the atmosphere or maybe carbon dioxide.

The key is in mounting a spectrograph on the telescope. Instead of collecting the overall light from the planet, that light is broken up into a spectrum of wavelengths. Imagine seeing a rainbow after a thunderstorm. That rainbow is simply the light from the sun broken up across all visible wavelengths due to ice crystals in our atmosphere. Molecules emit light at specific wavelengths, leaving well-known fingerprints that may be identified in a lab on Earth, in a rainbow in the sky, or in the spectrum of an exoplanet located 130 light years away.

When astronomers mounted their instrumentation (i.e. a coronagraph, an adaptive optics system, and a spectrograph) known as Project 1640 onboard the Palomar 5m Hale Telescope, they were able to shed new light on the HR 7899 system. Only last month one of its exoplanets revealed a mixture of water vapor and carbon monoxide in its atmosphere, but the story has changed. See a previous article in Universe Today.

Project 1640 observed not one – but four atmospheres at once. Gautam Vasisht of JPL explains, “in just one hour, we were able to get precise composition information about four planets around one overwhelmingly bright star.” These four exoplanets are believed to be coeval, in that they formed from a protoplanetary disk at roughly the same time. They also have the same luminosity and temperature, leading to the assumption that they are roughly similar to each other. But results show that they all have radically different spectra, and therefore different chemical compositions!

More specifically, HR 8799 b and d contain carbon dioxide, b and c contain ammonia, d and e contain methane, and b, d, and e contain acetylene. Noticing a few trends? There really aren’t any! Not only are these planets different from each other, they are also different from any other known objects. Acetylene, for example, has never been convincingly identified in a sub-stellar object outside the solar system. While the varying spectra pose many questions, one thing is clear: the diversity of planets must be greater than previously thought!

This is only the first exoplanet system for which we’ve obtained direct spectra of all exoplanet atmospheres. Project 1640 will conduct a 3-year survey of 200 nearby stars. The hope is to find hot Jupiters located far from their host star. While this is what the current technique allows astronomers to detect, it will also teach astronomers how Earth-like planets form.

“The outer giant planets dictate the fate of rocky ones like Earth. Giant planets can migrate in toward a star, and in the process, tug the smaller, rocky planets around or even kick them out of the system. We’re looking at hot Jupiters before they migrate in, and hope to understand more about how and when they might influence the destiny of the rocky, inner planets,” explained Vasisht.

In an attempt to understand our own blue marble, astronomers point their telescopes at uncanny worlds light years away. Project 1640 will block the light of distant stars in order to shed light on distant worlds as well as our own.

Sources: Jet Propulsion Laboratory, and B. R. Oppenheimer et al. 2013 ApJ 768 24

May 16, 2013December 23, 2015 by Elizabeth Howell

Hadfield’s Return to Earth: ‘I’m Still Learning How To Walk Again’

Chris Hadfield, speaking from Houston May 16, 2013 in his first press conference after his five-month mission. Credit: Canadian Space Agency/Ustream

Astronaut Chris Hadfield described himself as a man who never looks back. Still, he spoke fondly of his five months in space during the first press conference with media today (May 16) after his return to Earth earlier this week.

“I don’t spend my life going gosh, I went to [space station] Mir in 1995 and now everything else is boring. That’s not how I ever felt,” the Canadian said in a wide-ranging conversation that talked about everything from his future, to the science he performed, his favorite tweets while up in space.

First, let’s get a big question off the plate. Hadfield says himself he doesn’t know what he wants to do next. “I’m still learning how to walk again!” he exclaimed to one journalist who asked if he wanted to be Canadian Space Agency president.

Rehabilitation is occupying a lot of his time, he added: “I’m trying to stand up straight, and I have to sit down in the shower so I don’t faint and fall down. It’s like asking an infant if they’re ready for their Ph.D. yet. I’ll get there, but it’s too early to say.”

Hadfield getting checked out by doctors after his return. 'Wired head, chest, arms and feet, learning how the body works when it has been weightless for half a year,' Tweeted Hadfield. — Hadfield getting checked out by doctors after his return. ‘Wired head, chest, arms and feet, learning how the body works when it has been weightless for half a year,’ Tweeted Hadfield.

Hadfield brushed aside notions that he is famous for himself, saying it is a reflection of the hard work his crew put in on the station orbiting Earth. Expedition 35 was the most productive in terms of the science-to-maintenance ratio aboard the station, despite an ammonia leak gumming up the schedule very late in the mission.

He spoke most warmly of the science performed while aboard station. The Alpha Magnetic Spectrometer found possible hints of dark matter during his stay, for example. Hadfield and colleague Tom Marshburn also did aging research in space on behalf of the University of Waterloo, specifically looking at how blood pressure and blood flow changes among astronauts in orbit.

Canadian astronaut Chris Hadfield gives a thumbs up after landing safely in Kazahkstan. Via NASA TV.

Education and outreach were also something Hadfield was proud of. “The purpose is to help people to understand what is possible on the space station, and the things we are doing,” he said of his prolific tweeting and video creation.

The results, in many cases, were incredible. More than 7,000 Canadian students took part in experiments linked to the International Space Station, he said. Thousands more took part in a nation-wide singalong starring Hadfield. (Watch it below.)

Once Hadfield gets his feet underneath him and the mission fades into the past, he said he’s hoping to resume his life normally.

Astronauts of yesteryear, he said, often had big missions thrust upon them early in their lives. At age 53, for example, Hadfield is roughly 15 years older than Neil Armstrong was during the first moon landing in 1969.

For Hadfield, with two decades under his belt as an astronaut — three missions, several backup crew assignments, and some management positions to boot — he treats his everyday life with the same enthusiasm as his high-flying job.

“I take just as much pride in the big dock that my neighbor Bob and I built at the cottage as I do in building Canadarm2 on the space station. Those were both very complex projects that required a lot of physical effort, planning, decision making, and the product is out there for everybody to see. I feel really good about them both.”

Canadian astronaut Chris Hadfield in the Cupola of the International Space Station. Credit: NASA/CSA

He acknowledged that in a budget-conscious environment, the Canadian Space Agency is facing uncertainty, but he added that to treat today’s uncertainty as something unique is the wrong thing. Every mission carries a real risk of death. Every budget vote can kill or revive a space program — the station itself was only funded by a vote in one crucial Congress session in its history, he added.

“To say that things are uncertain is to talk about the space business. We are always hostage to our next launch. There has never been a period of certainty in the space business, ever,” he said.

His advice to those wanting to follow in his footsteps?

“The key thing is within yourself. If you want to become something, you have to start turning yourself into that thing, step by step, as a demonstration of personal will. That’s what I did when I was nine. I started turning myself into an astronaut.”

Watch the entire video of his press conference here.

May 16, 2013April 26, 2016 by Nancy Atkinson

Live Online Event: The Exploding Universe: the Realm of Supernovae

Animation of SN 2011fe in M101. Credit: Virtual Telescope Project

Supernovae are some of the fascinating objects in the Universe. The Virtual Telescope Project will be hosting a live webcast today UPDATE: the webcast will also be on May 17, 2013 as clouds arrived shortly into the webcast on on the 16th) at 21:00 UTC (5 pm EDT, 2 pm PDT) to explore in real-time — from the comfort of your home or office –the exciting world of supernovae, those incredible, violent exploding stars. All this with the live commentary from a professional astrophysicist, Gianluca Masi.

You can watch at this link.

During “The Exploding Universe: the Realm of Supernovae”, you can join in and surf the Cosmos in space and time, observing dying stars placed millions of light years way and shining as billions of Sun, while living the very final stages of their lives, before becoming a neutron star or a black hole.