Universe Today

November 5, 2013December 23, 2015 by David Dickinson

A Hybrid Solar Eclipse Seen From Earth… and Space

The Elektro-L satellite's view of how the Nov. 3, 2013 solar eclipse effected Earth. Blackness from the eclipse covers Africa. Credit: Elektro-L/Vitaliy EgorovVitaliy Egorov.

The final eclipse for 2013 was a grand event, witnessed across the Atlantic and the heart of Africa this past Sunday. Like so many other photographers along the North American east coast, we were at the ready to greet the partially eclipsed Sun at dawn. And as the shadow of the Moon touched down, teams on land, air and sea were ready to meet with the fleeting umbra as it raced eastward towards sunset over the Horn of Africa region.

But a fleet of spacecraft were also on hand to witness the rare spectacle as well. Turned earthward and sunward, these spacecraft documented not only the passage of the Moon’s shadow over the Earth, but recorded multiple partial solar eclipses from orbit as well.

The first view comes from the Roscosmos Electro-L satellite based in a geostationary orbit over the Indian Ocean:

Electro-L had captured such a view before, during the annular eclipse over Australia earlier this year in May. Roscosmos increased the frame capture rate of Electro-L to twice its usual speed for the sequence. As you watch the Earth pass from a waning gibbous to crescent phase, you can just see the umbra, or central shadow of the Moon, slide into view and come into contact with the sunset terminator over eastern Africa. You can also see the cloud cover that marks the dust storms that plagued eclipse-chasers based around the Lake Turkana region in Kenya.

One of the first public pictures of the umbra of the Moon as seen from space was taken from the Mir space station during a total solar eclipse in 1999. To our knowledge, such a feat has yet to be duplicated aboard the International Space Station. The phase angle of the ISS’s orbit during the eclipse was nearly perpendicular to the Sun-Moon-Earth syzygy, and unfavorable for this particular eclipse.

Thanks to the Russian journalist Vitaliy Egorov for bringing the Electro-L eclipse sequence to the attention of Universe Today!

Next up is a sequence of images from NASA’s Aqua satellite:

Sunday's eclipse and the Moon's umbra as seen from the Aqua satellite. (Credit: NASA/GSFC/Jeff Schmaltz/MODIS Land Rapid Response Team). — Sunday’s eclipse and the Moon’s umbra off of the west coast of Africa as seen from the Aqua satellite. (Credit: NASA/GSFC/Jeff Schmaltz/MODIS Land Rapid Response Team).

Launched in 2002, Aqua is part of the “A-train” (as in “Afternoon”) constellation of Earth-observing satellites. Perched in a low-Earth Sun-synchronous orbit, Aqua caught sight of the umbra of the Moon at around 14:45 UT on Sunday, November 3^rd as it raced to make first landfall over the nation of Gabon and awaiting eclipse chasers.

Some Sun observing spacecraft caught sight of the eclipse as well. The European Space Agency’s Proba-2 nabbed three partial solar eclipses from its vantage point in low Earth orbit:

PROBA-2 used its SWAP imager to grab the sequences. Orbiting the Earth once every 99 minutes or 14.5 time a day, these “orbital eclipses” are quick, lasting about 10 minutes each in duration.

Finally, EUMETSAT’s MeteoSat-10 meteorological satellite based in a geostationary orbit over Africa captured an outstanding sequence, showing nearly the entire trek of the umbra across the entire path of the eclipse:

The sequence runs from 7:30 to 18:30 UT on November 3^rd. Note how the video shows the shadow fade in and sharpen as the eclipse touches down off of the US East Coast and intensifies from an annular to total along the first 15 seconds of its track, only to speed up and flatten towards sunset over Africa. And all in six seconds!

And back here on Earth, we couldn’t resist stitching together the bounty from our own minor eclipse expedition for a stop-motion view of the partially eclipsed Sun rising over the Vehicle Assembly Building at the Kennedy Space Center in Florida:

We’d like to also mention a photo that isn’t a “solar eclipse seen from space…” Y’know the one, which shows the Earth, the Moon’s shadow, and a totally-eclipsed Sun, against a star dappled Milky Way. We won’t dignify it with a link. This has already been debunked by Bad Astronomer himself Phil Plait, but the bogus pic now seems to make its rounds across ye’ ole Web now during every eclipse. Seriously? Do we all crave “link juice” that bad? There are lots of real awesome eclipse photos out there, from Earth & beyond! Please, do your part to tell that well meaning friend/coworker/relative/stranger on Twitter that this “ultimate eclipse photo…” isn’t.

How rare are hybrid solar eclipses? Well, the next solar eclipse that is both annular and total along its track occurs over southeast Asia on April 20^th, 2023. It’s interesting to note that this past weekend’s eclipse may have been the first sunrise solar eclipse over the VAB since it was built in 1966. Eclipses in the same 18 years and 11 days- long saros cycle repeat, but move about 120 degrees westward. Thus, follow an eclipse cycle through a “triple saros”— known as an “Exeligmos,” an ultimate scrabble word if you can land it on a triple word score! —and an eclipse’s geometry will roughly line back up over a 54 year 33 day long span. Saros 143 produced a an eclipse crossing a similar path on October 2^nd, 1959 (before the VAB was built!) and will repeat its Atlantic sunrise performance on December 6^th, 2067! Let’s see, by then I’ll be…

November 5, 2013December 23, 2015 by Ken Kremer

India’s First Mars Mission Launches Flawlessly on Historic Journey to the Red Planet

Blastoff of the Indian developed Mars Orbiter Mission (MOM) on Nov. 5, 2013 from the Indian Space Research Organization’s (ISRO) Satish Dhawan Space Centre SHAR, Sriharikota. Credit: ISRO

WOW MOM !
Blastoff of the Indian developed Mars Orbiter Mission (MOM) on Nov. 5, 2013 from the Indian Space Research Organization’s (ISRO) Satish Dhawan Space Centre SHAR, Sriharikota. Credit: ISRO[/caption]

India flawlessly launched its first ever mission to Mars today (Nov. 5) to begin a history making ten month long interplanetary voyage to the Red Planet that’s aimed at studying the Martian atmosphere and searching for methane after achieving orbit.

The Mars Orbiter Mission (MOM) thundered to space atop the nations four stage Polar Satellite Launch Vehicle (PSLV) precisely on time at 14:38 hrs IST (9:08 UTC, 4:08 a.m. EST) from the Indian Space Research Organization’s (ISRO) Satish Dhawan Space Centre SHAR, Sriharikota, off India’s east coast.

“Our journey to Mars begins now!” announced an elated ISRO Chairman K. Radhakrishnan at the ISRO spaceport during a live broadcast of MOM’s launch from the mission control center. “We achieved orbit and we can all be proud.”

Flawless liftoff of India’s Mars Orbiter Mission (MOM) on Nov. 5, 2013 from the Indian Space Research Organization’s (ISRO) Satish Dhawan Space Centre SHAR, Sriharikota. Credit: ISRO

This was the 25th launch of India’s highly reliable 44 meter (144 foot) tall PSLV booster.

The 700,000 pound thrust PSLV rocket launched in its most powerful, extended XL version with six strap on solid rocket motors.

Launch of India’s Mars Orbiter Mission (MOM) on Nov. 5, 2013 from Sriharikota, India. Credit: ISRO

“I’m extremely happy to announce that the PSLV-C25 vehicle has placed the Mars orbiter spacecraft very precisely into an elliptical orbit around Earth of 247 x 23556 kilometers with an inclination of 19.2 degrees,” Radhakrishnan said, after “much meticulous planning and hard work by everyone.”

ISRO announced that MOM separated from the PSLV 4th stage as planned some 44 minutes after liftoff and that the solar panels successfully deployed.

Confirmation of the 4th stage ignition and spacecraft separation was transmitted by ship-borne terminals aboard a pair of specially dispatched tracking ships – SCI Nalanda and SCI Yamuna – stationed by ISRO in the South Pacific Ocean.

India’s Mars Orbiter Mission (MOM) streaks to orbit after launch on Nov. 5, 2013. Credit: ISRO

MOM was designed and developed by the Indian Space Research Organization (ISRO) in near record time after receiving approval from the Indian Prime Minister Manmohan Singh in August 2012.

“No mission is beyond our capability”, said Radhakrishnan. “MOM is a huge step taking India beyond Earth’s influence for the first time.”

A series of six burns over the next month will raise the apogee and put MOM on a trajectory for Mars around December 1.

Following a 300 day interplanetary cruise phase, the do or die Mars orbital insertion firing by the main engine on September 24, 2014 will place MOM into an 366 km x 80,000 km elliptical orbit.

If all continues to goes well with MOM, India will join an elite club of four who have launched probes that successfully investigated the Red Planet from orbit or the surface – following the Soviet Union, the United States and the European Space Agency (ESA).

MOM is the first of two new Mars orbiter science probes from Earth blasting off for the Red Planet this November. Half a globe away, NASA’s $671 Million MAVEN orbiter remains on target to launch barely two weeks after MOM on Nov. 18 – from Cape Canaveral, Florida.

The 1,350 kilogram (2,980 pound) MOM orbiter is also known as ‘Mangalyaan’ – which in Hindi means ‘Mars craft.’

Graphic shows MOM’s initial orbit around Earth after successful Nov. 5 launch. Credit: ISRO

Although the main objective is a demonstration of technological capabilities, the probe is equipped with five indigenous instruments to conduct meaningful science – including a multi color imager and a methane gas sniffer to study the Red Planet’s atmosphere, morphology, mineralogy and surface features. Methane on Earth originates from both geological and biological sources – and could be a potential marker for the existence of Martian microbes.

MOM’s 15 kg (33 lb) science suite comprises:

MCM: the tri color Mars Color Camera images the planet and its two tiny moons, Phobos and Deimos

LAP: the Lyman Alpha Photometer measures the abundance of hydrogen and deuterium to understand the planets water loss process

TIS: the Thermal Imaging Spectrometer will map surface composition and mineralogy

MENCA: the Mars Exospheric Neutral Composition Analyser is a quadrapole mass spectrometer to analyze atmospheric composition

MSM: the Methane Sensor for Mars measures traces of potential atmospheric methane down to the ppm level.

Scientists will be paying close attention to whether MOM detects any atmospheric methane to compare with measurements from NASA’s Curiosity rover – which found ground level methane to be essentially nonexistent – and Europe’s upcoming 2016 ExoMars Trace Gas Orbiter.

MOM and MAVEN will arrive nearly simultaneously in Mars orbit next September – joining Earth’s invasion fleet of five operational orbiters and intrepid surface rovers currently unveiling the mysteries of the Red Planet.

Both MAVEN and MOM’s goal is to study the Martian atmosphere , unlock the mysteries of its current atmosphere and determine how, why and when the atmosphere and liquid water was lost – and how this transformed Mars climate into its cold, desiccated state of today.

Although they were developed independently and have different suites of scientific instruments, the MAVEN and MOM science teams will “work together” to unlock the secrets of Mars atmosphere and climate history, MAVEN’s top scientist told Universe Today.

“We have had some discussions with their science team, and there are some overlapping objectives,” Bruce Jakosky told me. Jakosky is MAVEN’s principal Investigator from the University of Colorado at Boulder.

“At the point where we [MAVEN and MOM] are both in orbit collecting data we do plan to collaborate and work together with the data jointly,” Jakosky said.

The $69 Million ‘Mangalyaan’ mission is expected to continue gathering measurements at the Red Planet for about six to ten months and hopefully much longer.

Stay tuned here for continuing MAVEN and MOM news and my MAVEN launch reports from on site at the Kennedy Space Center press center.

Ken Kremer

…………….

Learn more about MAVEN, MOM, Mars rovers, Orion and more at Ken’s upcoming presentations

Nov 14-19: “MAVEN Mars Launch and Curiosity Explores Mars, Orion and NASA’s Future”, Kennedy Space Center Quality Inn, Titusville, FL, 8 PM

Dec 11: “Curiosity, MAVEN and the Search for Life on Mars”, “LADEE & Antares ISS Launches from Virginia”, Rittenhouse Astronomical Society, Franklin Institute, Phila, PA, 8 PM

November 4, 2013December 23, 2015 by Nancy Atkinson

22% of Sun-like Stars have Earth-sized Planets in the Habitable Zone

The "Goldilocks" zone around a star is where a planet is neither too hot nor too cold to support liquid water. Ilustration by Petigura/UC Berkeley, Howard/UH-Manoa, Marcy/UC Berkeley.

How common are planets like Earth? That’s been a question astronomers and dreamers have pondered for decades, and now, thanks to the Kepler spacecraft, they have an answer. One in five Sun-like stars in our galaxy have Earth-sized planets that could host life, according to a recent study of Kepler data.

“What this means is, when you look up at the thousands of stars in the night sky, the nearest sun-like star with an Earth-size planet in its habitable zone is probably only 12 light years away and can be seen with the naked eye. That is amazing,” said UC Berkeley graduate student Erik Petigura, who led the analysis of the Kepler and Keck Observatory data.

The Kepler telescope’s mission was to try and find small rocky planets with the potential for hosting liquid water and perhaps the ingredients needed for biology to take hold. For four years, the space telescope monitored the brightness of more than 150,000 stars, recording a measurement every 30 minutes.

Analysis by UC Berkeley and University of Hawaii astronomers shows that one in five sun-like stars have potentially habitable, Earth-size planets. (Animation by UC Berkeley/UH-Manoa/Illumina Studios)

For a recent focused study, scientists concentrated on 42,000 sun-like stars (G and K type stars), looking for periodic dimmings that occur when a planet transits — or crosses in front of — its host star. A team of scientists from the Kepler mission and the Keck telescope in Hawaii have announced that from that survey, they found 603 planets, 10 of which are Earth size and orbit in the habitable zone, where conditions permit surface liquid water.

Since there are about 200 billion stars in our galaxy, with 40 billion of them like our Sun, noted planet-hunter Geoff Marcy said that gives us about 8.8 billion Earth-size planets in the Milky Way.

But Marcy also cautioned that Earth-size planets in Earth-size orbits are not necessarily hospitable to life, even if they orbit in the habitable zone of a star where the temperature is not too hot and not too cold.

“Some may have thick atmospheres, making it so hot at the surface that DNA-like molecules would not survive. Others may have rocky surfaces that could harbor liquid water suitable for living organisms,” Marcy said. “We don’t know what range of planet types and their environments are suitable for life.”

Analysis of four years of precision measurements from Kepler shows that 22±8% of Sun-like stars have Earth-sized planets in the habitable zone. If these planets are as prevalent locally as they are in Kepler field, then the distance to the nearest one is around 12 light-years.Credit: Petigura/UC Berkeley, Howard/UH-Manoa, Marcy/UC Berkeley.

All of the potentially habitable planets found in their survey are around K stars, which are cooler and slightly smaller than the sun, Petigura said. But the team’s analysis shows that the result for K stars can be extrapolated to G stars like the sun.

The Kepler spacecraft is now crippled because of faulty gyroscopes, but scientists say had Kepler survived for an extended mission, it would have obtained enough data to directly detect a handful of Earth-size planets in the habitable zones of G-type stars.

If the stars in the Kepler field are representative of stars in the solar neighborhood, then the nearest (Earth-size) planet is expected to orbit a star that is less than 12 light-years from Earth and can be seen by the unaided eye. Future instrumentation to image and take spectra of these Earths need only observe a few dozen nearby stars to detect a sample of Earth-size planets residing in the habitable zones of their host stars.

“For NASA, this number – that every fifth star has a planet somewhat like Earth – is really important, because successor missions to Kepler will try to take an actual picture of a planet, and the size of the telescope they have to build depends on how close the nearest Earth-size planets are,” said Andrew Howard, astronomer with the Institute for Astronomy at the University of Hawaii. “An abundance of planets orbiting nearby stars simplifies such follow-up missions.”

Further reading: Institute for Astronomy, University of Hawaii; UC Berkeley; Keck Observatory; NASA; PNAS.

November 4, 2013December 23, 2015 by Jason Major

A Dark and Dusty Avalanche on Mars

Loose soil, dust and rock stains an icy cliffside on Mars (NASA/JPL/University of Arizona)

Mars may be geologically inactive but that doesn’t mean there’s nothing happening there — seasonal changes on the Red Planet can have some very dramatic effects on the landscape, as this recent image from the HiRISE camera shows!

The full extent of the 1000-meter-long dusty landslide (NASA/JPL/University of Arizona)

When increasing light from the springtime Sun warms up the sides of sheer cliffs made from countless layers of water and carbon dioxide ice near Mars’ north pole, some of that CO2 ice sublimes, sending cascades of loose soil and dust down to the terraced base below. This uncovered material stains the frost-covered polar surface dark, outlining the paths of avalanches for HiRISE to easily spot from orbit. (See the original HiRISE image here.)

Circling Mars since March 2006, the HiRISE camera aboard NASA’s Mars Reconnaissance Orbiter has even captured some of these polar landslides in action.

The rust-colored avalanche shown above has fallen hundreds of meters from the middle of a layered ice deposit, spreading nearly a kilometer across the frozen ridges at the base of the cliff. The view was acquired on Sept. 13, 2013.

Check out a video explaining this view and the processes that created it below, narrated by Phil Plait (aka the Bad Astronomer).

Mars’ seasonal polar caps are composed primarily of carbon dioxide frost. This frost sublimates (changes from solid directly to gas) in the spring, boosting the pressure of Mars’ thin atmosphere. In the fall the carbon dioxide condenses, causing the polar caps to reach as far as ~55 degrees latitude by late winter. By learning about current processes on a local level we can learn more about how to interpret the geological record of climate changes on Mars. (Source)

November 4, 2013December 23, 2015 by Ken Kremer

MOM’s Last Night on Earth; Midnight Marvel for India’s Mars Mission – Live Webcast

It’ s a Mind-Blowing Midnight Marvel !
India’s fueled PSLV rocket and Mars Orbiter Mission (MOM) await Nov. 5 blastoff at 14:38 hrs IST (9:08 UTC, 4:08 a.m. EST). Credit: ISRO.
Watch ISRO’s Live Webcast[/caption]

MOM is spending her last night on Earth – and she’s a Mind-Blowing Midnight Marvel !

The pride of all India, and everyone’s favorite MOM is healthy and set to embark on the nation’s first ever interplanetary voyage of exploration. She aims to conduct a detailed study of the Martian atmosphere and sniff for methane – a potential indicator for life.

The Mars Orbiter Mission (MOM) was designed and developed by the Indian Space Research Organization (ISRO) which is broadcasting a live webcast of the launch starting at 14:00 hrs IST, 3:30 a.m. EST at – http://isro.org/

“All vehicle systems have been switched ON,” as of now, says ISRO.

Now less than 8 hours from blastoff, the PSLV-C25 booster rocket is fully fueled and poised to streak from ISRO’s Satish Dhawan Space Centre SHAR, Sriharikota, located on India’s east coast in Andhra Pradesh state.

If all goes well with MOM, India joins an elite club of four who have launched probes that successfully investigated the Red Planet from orbit or the surface – following the Soviet Union, the United States and the European Space Agency (ESA).

Reaching Mars successfully is an enormous technological challenge. More than half of all Earth’s attempts have failed. But those who fail to ‘dare mighty things’ are doomed to timidity and ignominy.

Gorgeous view of the majestic Polar Satellite Launch Vehicle, PSLV C25 with its passenger, the Indian Space Research Organization’s (ISRO's) Mars Orbiter Mission (MOM) spacecraft inside. The Mobile service tower is also seen in the background. Credit: IRSO — Gorgeous view of the majestic Polar Satellite Launch Vehicle, PSLV C25 with its passenger, the Indian Space Research Organization’s (ISRO’s) Mars Orbiter Mission (MOM) spacecraft inside. The Mobile service tower is also seen in the background. Credit: IRSO

ISRO reports that the weather outlook is favorable for an on time launch on Nov 05, 2013 at 14:38 hrs IST (9:08 UTC, 4:08 a.m. EST).

“Weather Forecast for launch day based on today’s image from Kalpana Meteorological Satellite: Early morning, cloudy and low probability of Rain, No severe weather expected. During launch window – partly cloudy weather and no rain is expected.”

“Looks like we are heading towards a bright and sunny day for the launch,” says ISRO.

Today's weather image from India’s Kalpana Meteorological Satellite. Credit: ISRO — Today’s weather image from India’s Kalpana Meteorological Satellite. Credit: ISRO

Just hours ago the final loading of propellants into the rocket’s liquid fueled second stage (PS2) with highly toxic nitrogen tetroxide and hydrazine was satisfactorily completed.

The launch gantry has been retracted to a distance of 50 meters and the 44 meter (144 foot) tall four stage PSLV booster stands at the ready under the gaze of the starry night.

Two tracking ships – SCI Nalanda and SCI Yamuna – have been deployed to the Indian Ocean.

They are now in position to relay critical in flight telemetry during the ignition of the PSLV-C25 fourth stage and the spacecraft’s separation from the rocket at T plus 44 minutes.

“For about ten minutes between the separation of third stage of PSLV and ignition of fourth stage the vehicle will not be visible from any ground stations as will be evident in the Live telecast,” says ISRO.

And the launch team is leaving no stone unturned to ensure success!

“As the country gets embraced in deep sleep – don’t forget a few hundred tireless minds at ISRO – rock-steady on their consoles and keeping their strict vigil on the several health parameters of the rocket and the MoM spacecraft,” said ISRO in a statement.

And here’s a poetic tribute to MOM from ISRO

MOM is the first of two new Mars orbiter science probes from Earth set to blast off for the Red Planet this November. On the other side of Earth, NASA’s MAVEN orbiter remains on target to launch barely two weeks after MOM on Nov. 18 – from Cape Canaveral, Florida.

The 1,350 kilogram (2,980 pound) MOM orbiter is also known as‘Mangalyaan’ – which in Hindi means ‘Mars craft.’

‘Mangalyaan’ is outfitted with an array of five indigenous science instruments including a multi color imager and a methane gas sniffer to study the Red Planet’s atmosphere, morphology, mineralogy and surface features. Methane on Earth originates from both geological and biological sources – and could be a potential marker for the existence of Martian microbes.

The PSLV will inject MOM into an initially elliptical Earth parking orbit of 248 km x 23,500 km. A series of six orbit raising burns will eventually place MOM on a trajectory to Mars around December 1.

Tracking the MOM Mission! A complex network of ground stations, as indicated in the image, has been laid out for keeping an eye on the various phases of PSLV-C25/ ISRO's Mars Orbiter Mission, including the launch, Earth bound maneuvers, Heliocentric phase as well as the Martian phase. Additionally, two ship borne terminals have also been deployed in the southern Pacific Ocean to cover critical events during the launch phase. After satellite separation from the launch vehicle, the Spacecraft operations are controlled from the Spacecraft Control Centre of ISRO Telemetry, Tracking And Command Network (ISTRAC) in Bangalore. — Tracking the MOM Mission!
A complex network of ground stations, as indicated in the image, has been laid out for keeping an eye on the various phases of PSLV-C25/ ISRO’s Mars Orbiter Mission, including the launch, Earth bound maneuvers, Heliocentric phase as well as the Martian phase. Additionally, two ship borne terminals have also been deployed in the southern Pacific Ocean to cover critical events during the launch phase. After satellite separation from the launch vehicle, the Spacecraft operations are controlled from the Spacecraft Control Centre of ISRO Telemetry, Tracking And Command Network (ISTRAC) in Bangalore.

Following a 300 day interplanetary cruise phase, the do or die orbital insertion engine will fire on September 24, 2014 and place MOM into an 366 km x 80,000 km elliptical orbit.

MOM and MAVEN both arrive in Mars orbit within days of one another next September – joining Earth’s invasion fleet of five operational orbiters and intrepid surface rovers currently unveiling the mysteries of the Red Planet.

MAVEN’s goal is to study Mars atmosphere in unprecedented detail. The MAVEN and MOM science teams will “work together” to unlock the secrets of Mars atmosphere, MAVEN’s top scientist told Universe Today.

“At the point where we [MAVEN and MOM] are both in orbit collecting data we do plan to collaborate and work together with the data jointly,” Jakosky said.

Godspeed MOM !

Ken Kremer

November 4, 2013December 28, 2015 by Fraser Cain

Astronomy Cast 320: Layers of the Sun

Our Sun isn’t just a terrifying ball of white hot plasma, it’s actually a lot more complex. It’s got layers. And today, we’re going to peel back those layers and learn about the Sun – from the inside out.

Visit the Astronomy Cast Page to subscribe to the audio podcast!

We record Astronomy Cast as a live Google+ Hangout on Air every Monday at 12:00 pm Pacific / 3:00 pm Eastern. You can watch here on Universe Today or from the Astronomy Cast Google+ page.

November 4, 2013November 4, 2013 by Fraser Cain

Virtual Star Party – November 3, 2013

Host: Scott Lewis

Astronomers: Gary Gonella, Roy Salisbury, Nicole Gugliucci

We hold the Virtual Star Party every Sunday night as a live Google+ Hangout on Air. We begin the show when it gets dark on the West Coast. If you want to get a notification, make sure you circle the Virtual Star Party on Google+. You can watch on our YouTube channel or here on Universe Today.

November 4, 2013December 23, 2015 by Shannon Hall

Life After Kepler: Upcoming Exoplanet Missions

Artist's depiction of TESS. Image Credit: TESS team.

Last week I held an interview with Dr. Sara Seager – a lead astronomer who has contributed vastly to the field of exoplanet characterization. The condensed interview may be found here. Toward the end of our interview we had a lengthy conversation regarding the future of exoplanet research. I quickly realized that this subject should be an article in itself.

The following is a list of approved missions that will continue the search for habitable worlds, with input from Dr. Seager about their potential for finding planets that might harbor life.

Transiting Exoplanet Survey Satellite (TESS)

Slated to launch in 2017, TESS will search for exoplanets by looking for faint dips in brightness as the unseen planet passes in front of its host star. With a price tag of $200 million, TESS will be the first space-based mission to scan the entire sky for exoplanets.

While the Kepler space telescope confirmed hundreds of exoplanets (with thousands of candidates yet to be confirmed) it stared 3000-light-years deep into a single patch of sky. TESS will scan hundreds of thousands of the brightest and closest stars in our galactic neighborhood.

“TESS will find many planets,” explained Seager in our interview. “The ones we’re highlighting it will find are rocky planets transiting small stars.” One of the missions goals is to find earth-like exoplanets in the habitable zone – the band around a star where water can exist in its liquid state.

The team hopes that TESS will find up to 1000 exoplanets in the first two years of searching. This will give astronomers a wealth of new worlds to study in more detail.

While the stars Kepler examined were faint and difficult to study in follow-up observations, the stars TESS will focus on are bright and close to home. These stars will be prime targets for further scrutiny with other space based telescopes.

“We plan to have a pool of planets, maybe a handful of them, that we can follow up with the James Webb Space Telescope … which will look at the atmospheres of those transiting planets, looking for signs of life,” Seager said.

ExoplanetSat

While slightly under the radar, ExoplanetSat will monitor bright stars using nano-satellites. Each nano-satellite will be capable of monitoring a single, bright, sun-like star for two years.

“The way that we describe this mission is not that we will find earth,” Seager said. “But if there is a transiting earth-like planet around a bright sun-like star, we will find it.”

Currently no planned mission has the capability to survey the brightest stars in the sky. TESS will observe stars of magnitude 5 through 12 – the dimmest our eyes can see and fainter.

The brightest stars are too widely spaced for a single telescope to continuously monitor. The best method is to monitor the brightest sun-like stars in a targeted star search instead.

The mission is pretty far along in terms of funding. It has already received a few million dollars and is about one million short of launching the first prototype.

After a successful demonstration the goal is to launch a fleet of nano-satellites to observe enough bright stars to find a number of interesting exoplanets. One day we may be able to look at a bright star in our night sky and know it has a planet.

Direct Imaging Missions

Disentangling a faint, barely reflective, exoplanet from its overwhelmingly bright host star in a direct image seems nearly impossible. A common analogy is looking for a firefly next to a searchlight across North America. Needless to say, very few exoplanets have been seen directly.

Because of the difficulties NASA is fostering a study and soliciting applications with a single goal in mind: create a mission that will directly image exoplanets under a price cap of one billion dollars.

Seager is working with a team that plans to utilize a star shade – “a specially shaped screen that will fly far from the telescope and block out the light from the star so precisely that we will see any planets like earth.”

The shade isn’t circular but shaped like a flower. Light waves would bend around a circle and create spots brighter than the planets themselves. The flower-like shape avoids this while blocking out the starlight – making a planet that is one ten billionth as bright as its host star visible.

The star shade and the telescope have to be aligned perfectly at 125,000 miles away. Once aligned, the system will observe a distant star, and then move to another distant star and re-align. This is technologically speaking, unchartered territory.

While this mission may not occur in full tomorrow, or even years from tomorrow, astronomers’ synapses are firing. We’re coming up with new techniques that will advance technology and find earth-like worlds.

Etc.

Above is a list of only a handful of future exoplanet missions – all at various stages in their production – with some still on the drawing board and others having received full funding and preparing for launch. With creativity and advancing technology we’ll detect a true-earth analogue in the near future.

November 4, 2013December 23, 2015 by Elizabeth Howell

Photographer Catches ATV-4’s Fiery Plunge Through the Atmosphere

The faint streak on the left side of this image, just above the house, is a look at the ATV-4 Albert Einstein less than 30 minutes before it plunged through the atmosphere. Taken from Thailand. Credit and copyright: Oliver Broadie.

UPDATE: Editor’s note: Here’s a story that we’ve updated a couple of times, and now it ultimately has a happy ending. We originally posted a picture from Oliver Broadie who thought he captured an image of the ATV-4 Albert Einstein right before it burned up in the atmosphere. That image, see below, was ultimately determined to be of the International Space Station and not the ATV-4, so yesterday we pulled the image and explained why. But now, thanks to a great discussion between the photographer and satellite tracker Marco Langbroek (see it in the comment section), they have determined that Oliver actually did capture the ATV-4 in a subsequent image taken about 4 minutes later. Thanks to both Ollie and Marco for analyzing the timing and images. Also, we were in error for saying that the image showed the ATV-4 burning up in the atmosphere. That was my mistake (Nancy).

And you can now actually see images of ATV-4’s fiery plunge taken by the ISS astronauts here — Nancy Atkinson, Senior Editor.

Universe Today reader Oliver Broadie captured this shot of the International Space Station, shot from Sukhothai, Thailand. Just a few minutes later, the ATV-4 flew by at a lower altitude. Credit: Oliver Broadie

Each Automated Transfer Vehicle series ferries cargo to the International Space Station, stays attached for a few months to do routine boosts to the station’s altitude, then leaves with a haul of trash to burn up in Earth’s atmosphere.

ATV-4 Albert Einstein backs away from the space station after five months in space. It burned up in the Earth's atmosphere Nov. 2, 2013. Credit: ESA/NASA — ATV-4 Albert Einstein backs away from the space station after five months in space. It burned up in the Earth’s atmosphere Nov. 2, 2013. Credit: ESA/NASA

Albert Einstein carried a record 5,467 pounds (2,480 kg) of cargo for its type of vehicle and also brought away the most garbage of the series of vehicles. It did six reboosts of the ISS’ altitude and among its precious cargo was a GPS antenna for Japan’s Kibo laboratory as well as a water pump for Europe’s Columbus laboratory, according to the European Space Agency.

The cargo ship undocked from the space station on Oct. 28 after five months in space. It burned up Nov. 2 at 12:04 GMT within sight of the astronauts. The next of the series, Georges Lemaitre, is in French Guiana for a launch aboard an Ariane 5 rocket that will take place in June 2014.

The ATVs are just one of many space trucks that visit the International Space Station. Check out this recent article on cargo ships past and present to see other ones that ferry stuff into space.

November 4, 2013December 23, 2015 by Elizabeth Howell

Fancy A Space-To-Earth Quilting Bee? Here’s Your Chance To Participate

NASA astronaut Karen Nyberg quilting during her Expedition 35/36 mission in 2013. Credit: Karen Nyberg (Pinterest)

From guitar playing to quilting, it’s clear that the astronauts aboard the International Space Station have excellence in other interests besides their core jobs. NASA astronaut Karen Nyberg, shortly finishing up her nearly half-year mission in space as part of Expedition 35/36, is an accomplished crafter. She’s found time to make a dinosaur from spare scraps and several headbands to keep her long hair from flying in her face. And now she wants you to join with her work.

Despite her skill in crafting, however, Nyberg says working in microgravity is quite the challenge. She keeps all her supplies in a ziploc so they don’t go flying in all directions when she’s not using them. A pile felt board keeps everything secured while she is working on a piece.

But measuring and cutting when you can’t lay something down means working takes a long, long time. That’s what makes this single nine-inch-by-nine-inch quilting block below so precious.

NASA astronaut Karen Nyberg holds a quilt patch that she made in space during Expedition 36/37 in 2013. Nyberg is inviting quilters to submit star-themed patches of their own for a quilt to display at the International Quilt Festival in Houston in 2014. Credit: NASA (YouTube/screenshot)

Nyberg says her work is “far from being a masterpiece”, but is inviting other quilters to share the metaphorical stage with her creation. Quilters anywhere in the world can make star pieces of their own and send it to the International Quilting Festival organizers for display in fall 2014. If all goes well, Nyberg expects to make an appearance to view the creation herself.

Here’s a short summary of the requirements (which you can read officially on this page):
– Have a star theme;
– 9.5 inches (24 centimeters) square;
– One block per person, signed on the front with a permanent marker marking name and location;
– Mail by Aug. 1, 2014 to “Star Block Challenge, Attn: Rhianna Griffin, 7660 Woodway Ste. 550, Houston, TX 77063.”

By the way, the full video of Nyberg explaining her sewing challenges makes you sympathize with how hard microgravity can be. Although the backflip she does at the end likely makes up for at least some of it, right?