Universe Today

December 21, 2012December 23, 2015 by Nancy Atkinson

Win a Deck of Hubble Star Cards

A couple of years ago Universe Today writer John Williams created a card game called Hubble Star Cards, and the game won a Hubble Gold Star award in 2010 from NASA and the Institute for Global Environmental Strategies for its inspiring use of the amazing imagery from the Hubble Space Telescope. As the description says, “the vivid, stunning images motivate and engage children of all ages to learn about objects in space. Now, thanks to John, Universe Today is giving away two decks of these beautiful cards!

In order to be entered into the drawing, just put your email address into the box below before Tuesday, December 25nd, 2012. We’ll send you a confirmation email, so you’ll need to click that to be successfully entered.

Hubble Star Cards are a high-quality, stunningly beautiful printed card set that are just a bit larger than a normal card deck, at 3 inches by 5×5 inches, so the beautiful Hubble images are bigger and better.

“Hubble has a unique ability to draw the public into exploring space,” says John. “Through beautiful images of planets, star clusters, pillars of dust, and galaxies, Hubble provides a crucial stepping stone in the process of scientific inquiry. Hubble Star Cards create a hand-held experience that opens the door to new questions and answers. You can actually hold the Universe, all of creation, in the palm of your hand and have fun learning about it at the same time.”

The game includes 60 cards categorized by planets, planetary nebulae, supernovae remnants, nebulae, star clusters and galaxies. The cards include an image, a basic description, a key to the type of object, location in the sky, constellation, and distance from Earth. Possible games include War, Go Fish, Sorting, Distances and Matching. Although targeted for students 8 and older, preschoolers have played many of the games just by using the amazing imagery as a guide.

If you are not a winner, these cards sell for $24.95, but Universe Today readers can get 15% off using UNIVERSE as a coupon code. Check them out at the Hubblestarcards.com website.

We’re only going to use these email addresses for Universe Today giveaways/contests and announcements. We won’t be using them for any other purpose, and we definitely won’t be selling the addresses to anyone else. Once you’re on the giveaway notification list, you’ll be able to unsubscribe any time you like.

December 21, 2012December 23, 2015 by Nancy Atkinson

Space: The Last Minute Holiday Gift Idea Frontier

I’m a last minute shopper, and luckily there are a lot of spacey gifts and greetings that you can still take advantage of. For example in the greeting card department, the Hubble Holiday Cards are fabulous, with loads of imagery from everyone’s favorite space telescope — such as the one above — that can be printed out and sent as cards, or it’s easy to nab one of their holiday greeting images to send via email, as I have done in the past! If you are looking for e-greeting cards, the European Space Agency has a great collection of images that can be sent to anyone in your email list.

What else?

Here’s a great deal and a way to support astronomy around the world: Astronomers Without Borders have recently added some great astronomy gear and goodies to their store for the holidays — and it’s a win-win situation for everyone, as many of these items are donations from manufacturers who support AWB, so they get 100% of proceeds!

If you aren’t familiar with AWB, they help support astronomy programs around the world, supplying resources and support for astronomy outreach. So, whether you’re buying a gift for someone else or for yourself, you can feel great about a purchase from the AWB store knowing it will be supporting great astronomy programs.

Hubble Star Cards are gorgeous, large playing cards for any age, now available in a high-quality, stunningly beautiful printed card set.

The cards are a just a bit larger than a normal card deck, at 3 inches by 5×5 inches, so the beautiful Hubble images are bigger and better. They sell for $24.95, but Universe Today readers can get 15% off using UNIVERSE as a coupon code. Check them out at the Hubblestarcards.com website.

The game includes 60 cards categorized by planets, planetary nebulae, supernovae remnants, nebulae, star clusters and galaxies, and possible games include War, Go Fish, Sorting, Distances and Matching. Although targeted for students 8 and older, preschoolers have played many of the games just by using the amazing imagery as a guide.

Also, we’ve been promoting the Year in Space 2013 Wall Calendars, and they truly are fabulous. The Wall Calendar was recently named “Science Geek Gift of the Year” over at Alan Boyle’s MSNBC’s Cosmic Log, — where you can see some other gift ideas.

As a special bonus, Universe Today readers pay only $12.95 per copy (or less), with free U.S. shipping and discounted International shipping. Again, visit Year in Space 2013 Wall Calendars,

While you are probably past the date for shipments on any of the above merchandise arriving before Christmas, a little preview of what is on the way could be placed in a stocking.

December 21, 2012December 23, 2015 by Nancy Atkinson

Today’s Solstice Sun

This beautiful image from the Solar Dynamics Observatory provides a view of our Sun on the solstice (winter solstice for the northern hemisphere and summer solstice for the southern hemisphere,) at 11:12 UTC, December 21, 2012. No killer solar flares, no apocalypse, just pure beauty and the life-giving light and warmth from Old Sol.

Happy solstice to all!

Via @Camilla_SDO

December 21, 2012December 23, 2015 by Nancy Atkinson

New Crew Arrives at Space Station

The latest crew has arrived to the International Space Station! Cosmonaut and Expedition 34/35 Soyuz Commander Roman Romanenko, Flight Engineer Tom Marshburn of NASA and Flight Engineer Chris Hadfield of the Canadian Space Agency docked their Soyuz TMA-07M at 14:09 UTC (9:09 a.m. EST) to the Rassvet module on the Russian segment of the ISS. We extend special congratulations to Hadfield, as we have been featuring him in our series about his training for the mission. He told us how much he is looking forward to his 5-month mission in space. “After a lot of lucky coincidences and a lot of hard work I get to be one of those who stays for an extended period off the planet. I’m really looking forward to it,” he said.

Hatches are expected to open at 16:15 UTC (11:15 am EST) after checking for leaks, etc. The new crew will be welcomed by Expedition 34 commander Kevin Ford and Russian cosmonauts Evgeny Tarelkin and Oleg Novitskiy, who have been on board since Oct. 23.

NASA says the crew will begin with a relatively light schedule and a break for the holidays of Christmas, New Years and the Russian Christmas holiday on January 6. But they’ll be busy during their mission with the arrival of Russian and European Space Agency resupply and two commercial companies, SpaceX and Orbital are scheduled to send their cargo ships to the ISS in March and April.

Ford, Novitskiy and Tarelkin are scheduled to leave the ISS in the middle of March, and at that point, Hadfield will become commander of Expedition 35, the first Canadian to to command the ISS.

Hadfield, Marshburn and Romanenko during their final Soyuz sim on Earth. Credit: NASA

December 21, 2012December 23, 2015 by Elizabeth Howell

‘Live’ Tweeting Apollo 17’s Mission

Lunar and Planetary Rovers covers both the manned rovers used on the final three Apollo lunar missions with the unmanned rovers used to explore the surface of Mars - under one book. Photo Credit: NASA/Jack Schmitt

40 years ago on December 19, 1972, Apollo 17 splashed down on Earth, marking the end of the manned moon missions. The astronauts came back with a treasure trove of rocks collected in 22 hours of extra-vehicular activity on the lunar surface, including “orange” soil that ended up coming from an ancient volcano.

Twitter wasn’t around back then, but anyone tuning into several Twitter accounts recently week would have a chance to experience what it could it have been like. Using mission transcripts and historical accounts of Apollo 17, these folks took it upon themselves to tweet the Apollo 17 mission, moment by moment, as “live” as possible.

Universe Today caught up with two of the tweeters. This is an edited version of what they said about the experience.

Liz Suckow (@LizMSuckow), a NASA contract archivist who tweeted on her own time

Researching a mission is divided into two parts, prelaunch and flight. For prelaunch, I use whatever official NASA documents, histories, and relevant astronaut and mission controller autobiographies I can find.

From what I’ve seen on the missions I’ve tweeted, until Apollo, no prelaunch conversation was transcribed at all. For Apollo, the last hour or so before liftoff is on the mission transcript. So, I can schedule those tweets. But, prelaunch activities for the astronauts start as long as 10 hours before liftoff. So, I use whatever resources I can to find references to the time of important events, and the rest of the prelaunch scheduling is educated guesswork. Flight is easy.

I have been trying to tweet as if I was the Johnson Space Center public affairs officer during the particular mission. When I joined Twitter in November of 2010 and was looking for accounts to follow, I came across a dead feed from JSC, I can’t remember the account name, that tweeted what had happened during a shuttle mission in real time.

Apollo 17, the only lunar mission to launch at night. Image Credit: NASA/courtesy of nasaimages.org

I thought, “Wow, that’s cool! Somebody ought to do that for the historical missions.” The celebration of the 40th anniversary of Apollo was still a big deal at NASA at the time, and the next mission up was Apollo 14. I figured someone else at NASA would have the same idea, but it was never mentioned. So, I figured I would do it on my personal account, just to see if it could be done and if anybody else (even if it was only a few people) liked the idea.

I am definitely going to be doing another one. I think the next anniversary is either Gordon Cooper‘s Mercury flight in May 2013, or the first Skylab missions. Not quite sure how I want to handle Skylab yet, may throw that one open to followers for ideas. Why do I do it? I do it because it is fun. Sometimes, I get so mentally involved the mission I get excited for what’s coming next as I am scheduling the tweets (even though I know full well what’s going to happen).

Buck Calabro (@Apollo17History), space fan who live-Tweeted along with Thomas Rubatscher

I’m live tweeting because I’m interested in Apollo. It’s a life-long interest. I myself live Tweet mostly by actually typing the tweet into HootSuite.com or Twitter.com. I have collaborated with Thomas by creating a spreadsheet of candidate tweets that he can upload into HootSuite’s bulk uploader for time-delayed tweeting.

My tweets mostly center around the command module pilot, Ron Evans. He spent three days all by himself in the CM, doing photography, mapping and other experiments. Not exactly the same sort of fame that the moonwalkers got. It’s a different kind of grit. Imagine being Evans, as AMERICA goes around the limb of the moon, completely cut off from every human being in the universe. Nothing but some fans, pumps and procedure to keep you going.

I have no plans for leveraging the Tweets. I’ll probably do another one someday. It’s a lot of work. As far as resources, I prefer source material. I have copies of the original transcripts for ground-to-air communications. The Apollo Lunar Surface Journal is a treasure trove of images and transcripts for the lunar surface portion of the mission, and the Lunar and Planetary Institute has an extensive catalog of imagery by camera magazine (which can be found in the transcripts.) NASA has scanned vast quantities of Apollo-era documentation, and the experiment results are likewise mostly available in the public domain.

December 21, 2012December 23, 2015 by Jason Major

Shepherd Moon Face-Off!

Raw Cassini image acquired on Dec. 18, 2012 (NASA/JPL/SSI)

Two of Saturn’s shepherd moons face off across the icy strand of the F ring in this image, acquired by the Cassini spacecraft on December 18, 2012.

In the left corner is Pandora, external shepherd of the ropy ring, and in the right is Prometheus, whose gravity is responsible for the subtle tug on the wispy ring material. (Please don’t blame the moon for any recent unsatisfying sci-fi films of the same name. There’s no relation, we promise.)

Similar in size (Pandora is 110 x 88 x 62 km, Prometheus 148 x 100 x 68 km) both moons are porous, icy, potato-shaped bodies covered in craters — although Prometheus’ surface is somewhat smoother in appearance than Pandora’s, perhaps due to the gradual buildup of infalling material from the F ring.

Check out some much closer images of these two moons below, acquired during earlier flybys:

Here’s Pandora, as seen by Cassini on September 5, 2005:

False-color image of Pandora (NASA/JPL/SSI)

…and here’s Prometheus, seen during a close pass in 2010 and color-calibrated by Gordan Ugarkovic:

Prometheus casting a shadow through F ring haze (NASA/JPL/SSI/Gordan Ugarvovic)

The external edge of the A ring with the thin Keeler gap and the wider Encke gap can be seen at the right of the top image. Both of these gaps also harbor their own shepherd moons — Daphnis and Pan, respectively.

These moons keep their gaps clear, as well as maintain the crisp edge shapes of the nearby rings — hence the term “shepherd.”

Image credit: NASA/JPL/Space Science Institute

December 20, 2012December 23, 2015 by Jason Major

NASA’s Final 2012 Doomsday Debunking Video (We Hope)

Despite countless articles published over the course of several years to the contrary, despite videos and interviews with some of the world’s most prominent and well-respected astronomers, despite new archaeological discoveries and well-established knowledge, despite the laws of physics, for crying out loud (and, curiously enough, even despite the fact that parts of the world are, at the time of this writing, already well within the supposed “doomsday” with nary a Nibiru in sight) many people are still wondering what will happen on the much-touted December 21, 2012, aka “doomsday” per the end of the 13th b’ak’tun of the Maya calendar (or something like that.) After all, if it’s trending on Twitter it must be important, right?

Well, yes and no. No because there’s not a shred of truth to the whole thing (except for the fact that there were Maya and they had a calendar) but yes because many people are actually very concerned about… well, I guess about the safety of the world. (Don’t believe me? Read this.) Which is in itself reasonable, I suppose. So in the nature of public outreach and the attempt to spread real information to combat the other kind, NASA’s has released yet one more video interview with astrophysicist David Morrison, director of the Carl Sagan Center for Study of Life in the Universe at the SETI Institute. I don’t know if David could tell you how to replace a broken head gasket or perform an appendectomy, but when it comes to space he knows his stuff. So check out the video, be not alarmed, and pass it on to anyone you know who might still be feeling the b’ak’tun blues.

See you on the 22nd! (Still skeptical? Check out some other videos and links below.)

And here’s a “reality check” from JPL’s Don Yeomans, an expert on near-Earth objects and asteroids:

So rest assured, the only astronomical event expected for the 21st is the winter solstice (summer in the south), which happens every year on every planet with an axial tilt with no ill effects (besides perhaps a sudden sinking realization that you’re nowhere near done with your holiday shopping.) Happy solstice!

December 20, 2012December 23, 2015 by Jason Major

The Most Remote Workplace on Earth

ESA’s Proba-1 satellite imaged the French-Italian Concordia base on November 21, 2012 (ESA)

Located in one of the loneliest locations on Earth, the French-Italian Concordia station was captured on high-resolution camera by ESA’s Proba-1 microsatellite last month, showing the snow-covered base and 25 square kilometers of the virtually featureless expanse of Antarctic ice surrounding it.

A cluster of scientific research buildings situated 3233 meters above sea level in the Antarctic interior, Concordia is one of the only permanently-crewed stations on the southern continent. Around 12–15 researchers and engineers spend months — sometimes over a year — in isolation at Concordia, where during the winter months there are no deliveries, no chance of evacuation, temperatures below -80 ºC (-112 ºF) and the next closest station is 600 km (370 miles) away. It’s like working on another planet.

And that’s precisely why they’re there.

The researchers who live and work at Concordia are there because of the station’s incredible remoteness and harsh conditions. This allows them to study not only the pristine Antarctic ice beneath their feet but also how humans behave in such an environment, where a small team must learn to work together and merely venturing outside can be a hazardous task.

It’s the next closest thing to an actual outpost on Mars, or the Moon. Even the astronauts on the ISS aren’t as far removed from the rest of the world.

(Although the night sky views from Concordia can be comparably stunning.)

Concordia Base boasts some of the clearest, darkest — and coldest — skies on Earth (ESA/IPEV/PNRA – A. Salam)

“Boredom and monotony are the enemy,” wrote ESA-sponsored medical researcher Dr. Alex Salam, regarding his 2009 13-month stay. “The darkness has a habit of sucking the motivation out of even the hardiest. But despite the effects the darkness can have on sleep, mood and cognitive performance, there is something inherently special about the Antarctic night. The heavens present a view that many stargazers can only ever dream of. You just have to try and catch a glimpse of the stars before your eyelashes freeze together!

“Seeing the station from a distance with the Milky Way towering far above it never failed to make me feel both awe inspired and simultaneously insignificant.”

And another recent long-term resident of Concordia, Dr. Alexander Kumar, who departed the base on November 15, shared this reflection as his year-long term was approaching its end:

“Concordia has, in removing me from civilisation where sometimes it is harder to step back, enabled me to see the bigger picture, provide a unique experience and reminded me of somethings, setting a course and direction for the future… I think once you come to Antarctica, drawn to it under a spell like a seaman to a mermaid, you never can break the link you form with this raw, rugged and ruthlessly beautiful and enticing continent.”

The Sun returns to the Antarctic plateau (ESA/IPEV/PNRA – A. Salam)

“It’s the closest thing I’ll ever have to living on another planet.”

– Dr. Alex Salam

Read more about Concordia on the newly-redesigned ESA site here.

In orbit for over 11 years, Proba-1’s unique images are used by hundreds of scientific teams worldwide. To date its main Compact High Resolution Imaging Spectrometer (CHRIS) has acquired over 20,000 environmental science images used by a total of 446 research groups in 60 countries.

December 19, 2012December 23, 2015 by Jason Major

Evidence for Active Hollows Formation on Mercury

MESSENGER targeted-observation image of the interior of Eminescu crater

A recent image acquired by NASA’s MESSENGER spacecraft shows the interior of Eminescu, a youngish 130-km (80 mile) wide crater just north of Mercury’s equator. Eminescu made science headlines last year with MESSENGER’s discovery of curious eroded blotches called “hollows” scattered across its interior and surrounding its central peak, and now it looks like the spacecraft may have spotted some of these strange features in their earliest stages of formation along the inner edge of the crater’s rim.

First announced in September 2011, hollows have now been identified in many areas across Mercury. They had showed up in previous images as only bright spots, but once MESSENGER established orbit in March 2011 and began its high-resolution imaging of Mercury’s surface it soon became clear that these features were something totally new.

The lack of craters within hollows indicates that they are relatively young. It was suggested that they may be the result of an ongoing process on Mercury — a suggestion supported by this recent image, acquired on November 19, 2012.

In addition to the hollows seen in the smooth central part of the crater and around the base of the central peak, there are also some small bright spots visible within the knobby terrain extending from the base of the crater wall (see detail at right). These bright spots could well be very young hollows, revealing a process in action that is, as far as we know, unique to the planet Mercury.

It’s thought that hollows are formed by the solar wind constantly blasting Mercury’s surface, scouring away deposits of volatile materials in its crust that have been left exposed by impacts.

The image above shows an area about 42 km across. Read more on the MESSENGER mission site here.

Image credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

December 19, 2012December 23, 2015 by Nancy Atkinson

Five Planets Around Nearby Star Tau Ceti; One in Habitable Zone

The location of Tau Ceti in the night sky. Credit: University of Hertfordshire

Look up in the sky tonight towards the southeast in the constellation Cetus. There’s a naked-eye star named Tau Ceti that lies about 12 light-years away from Earth, and astronomers have discovered a system of at least five planets orbiting Tau Ceti, including one in the star’s habitable zone.

While the recent discovery of a Earth-sized planet around the triple star system Alpha Centauri is the closest planet that has been discovered at just 4.3 light years away, this new discovery is the closest single sun-like star that we know of to host of an entire system of planets. The five planets are estimated to have masses between two and six times the mass of the Earth, making it the lowest-mass planetary system yet detected. The planet in the habitable zone of the star has a mass around five times that of Earth, making it the smallest planet found to be orbiting in the habitable zone of any Sun-like star.

“This discovery is in keeping with our emerging view that virtually every star has planets, and that the galaxy must have many such potentially habitable Earth-sized planets,” said astronomer Steve Vogt from UC Santa Cruz, coauthor of the paper describing the discovery. “We are now beginning to understand that nature seems to overwhelmingly prefer systems that have multiple planets with orbits of less than 100 days. This is quite unlike our own solar system, where there is nothing with an orbit inside that of Mercury. So our solar system is, in some sense, a bit of a freak and not the most typical kind of system that Nature cooks up.”

An artist’s impression of the Tau Ceti system. (Image by J. Pinfield for the RoPACS network at the University of Hertfordshire.)

Tau Ceti has long been a target of both detailed astronomical study and hopeful science fiction, since it is among one of the 20 closest stars to Earth. It is also easily visible to the naked eye and can be seen from both the Northern and Southern Hemisphere. During the 1960’s, Project Ozma, led by SETI’s Frank Drake, probed Tau Ceti for signs of life by studying interstellar radio waves with the Green Bank radio telescope. Science fiction authors like Robert Heinlein, Isaac Asimov and Frank Herbert used Tau Ceti as destinations and focal points in their books.

Scientists know this star has a dusty debris disk at least 10 times more massive than our solar system’s Kuiper Belt, and it has been observed long enough that no planets larger than Jupiter have been found.

An international team of astronomers from the United Kingdom, Chile, United States, and Australia, combined more than six-thousand observations from the UCLES spectrograph on the Anglo-Australian Telescope, the HIRES spectrograph on the Keck Telescope, and reanalysis of spectra taken with the HARPS spectrograph available through the European Southern Observatory public archive.

Using new techniques, the team found a method to detect signals half the size of previous observations, greatly improving the sensitivity of searches for small planets.

“We pioneered new data modeling techniques by adding artificial signals to the data and testing our recovery of the signals with a variety of different approaches,” said lead author Mikko Tuomi of the University of Hertfordshire. “This significantly improved our noise modeling techniques and increased our ability to find low-mass planets.”

Tau Ceti e is the planet in the habitable zone, and its year is about half as long as ours. An independent study of the data from the system done by Abel Méndez at the University of Puerto Rico at Arecibo says that the fifth planet, Tau Ceti f, may also be in the habitable zone.

While over 800 planets have been discovered orbiting other worlds, planets in orbit around the nearest Sun-like stars are particularly valuable to study, the team said.

“Tau Ceti is one of our nearest cosmic neighbors and so bright that we may be able to study the atmospheres of these planets in the not-too-distant future. Planetary systems found around nearby stars close to our Sun indicate that these systems are common in our Milky Way galaxy,” said James Jenkins of Universidad de Chile, a visiting fellow at the University of Hertfordshire.

The team’s paper that has been accepted for publication in Astronomy & Astrophysics.

Read the team’s paper: Signals embedded in the radial velocity noise (pdf file) or here on arVix

Sources: University of California Santa Cruz, University of Hertfordshire