Seeing Red

Look out Mars, here we come (again)!

Yep, we're about to launch another spacecraft to Mars.  It's exciting!  Hopefully, on November 18th, the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft will liftoff from Cape Canaveral and begin the 10-month journey to the Red Planet.

An artist's concept of the MAVEN spacecraft at Mars.  Courtesy Wikipedia.

We've learned a great deal about the chilly little world next door over the years.  Rovers aplenty have driven its surface - two of which, Curiosity and Opportunity, are still active.  We've discovered an abundance of evidence that shows that water once flowed freely across the surface of Mars...it may have formed rivers, lakes, even oceans.

If that is so, the atmosphere of Mars must once have been thicker, for the current thin atmosphere of Mars does not allow water to remain on the surface in liquid form for very long.  Where did this atmosphere go?  What happened to all the water?  On a more global scale - how has the global climate of Mars evolved over the millennia?  And what does that teach us about global climate change here on the Earth?  The MAVEN mission will be headed to Mars to help us answer these questions.

The reddish-orange atmosphere of Mars is visible above the surface in this image from Viking.  Note the Galle "Smiley Face" Crater towards the center-left of the image.  Courtesy Wikipedia.

MAVEN will be an orbiter, remaining above the planet to inspect its atmosphere and how it changes over an extended period of time.  It's four primary mission objectives are:

• Determine the role that loss of volatiles to space from the Mars atmosphere has played through time.
• Determine the current state of the upper atmosphere, ionosphere, and interactions with the solar wind.
• Determine the current rates of escape of neutral gases and ions to space and the processes controlling them.
• Determine the ratios of stable isotopes in the Martian atmosphere.

This data will help us understand a lot about how Mars has changed over the long history of the solar system.  It's also important data to have as we continue to consider the possibility of sending humans to explore the surface of the Red Planet.

We're going to Mars now because Mars is making its way closer to us.  In April of next year, Mars will once again make a close approach to Earth, meaning that travel time from Earth to Mars is shorter now.  If problems force a delay in launching MAVEN beyond December 7, scientists will have to wait until 2016 before they can try again.  So hopefully, all systems will be go on November 18 for a great launch!  You can watch the launch activities online at NASA-TV.  And before we know it, even more exciting data will be coming our way from the Red Planet!

More from the universe in two weeks!
Until then,
Carpe Noctem!
Kelly

NASA and the Fiscal Cliff

Sounds like the title of a fairy tale, doesn't it?  Alas, if only it were.

The fiscal cliff has been the subject of much discussion of late, of course, as our government has chosen to kick the can further down the road before dealing with the issue yet again.  With discussions of this kind, there's something often mentioned by well-meaning folks that just forces me to get out my soap box and hold forth.

It usually begins something like this..."They should just eliminate funding for NASA...we've got problems here at home, we don't need to be worrying about space!"

I grit my teeth, take a deep breath, and find myself standing on the soap box yet again.

First and foremost, the point is often made that even eliminating NASA's budget entirely would do little to save America much money.  In 2011, NASA's funding allocation represented 0.5% of America's overall spending...but that 0.5% represents a full 35% of the total spending on academic scientific research in the United States.  Trimming the budget by 0.5% won't save us much...but slicing the academic research budget by one-third will cripple the course of scientific endeavour in the United States.  We really, really cannot afford that.

How NASA spent its money in every state in the union in 2003.  Courtesy Wikipedia.

Second, listening to some politicians hold forth on the ills of NASA, and how their spacecrafts fail, costing the U.S. taxpayer millions of dollars...I sometimes wonder what they think NASA does with the money.  Let me make one thing completely clear: NASA does not cram their spacecrafts full of dollar bills before launching them into space.  Truly!  All the money apportioned to be spent on a given mission is spent right here on the planet Earth.  Each mission represents dozens, if not hundreds of well-paying jobs for Americans, companies which contract to NASA, and of course, technological developments with a wide range of applications.  Believe me, the money spent on a spacecraft like Mars Observer was still well spent, even when the mission failed.  What was lost was the science payoff.  We missed out on learning amazing things about Mars when we lost contact with the spacecraft...but the money was still safely here on Earth, driving the economy forward.

An artist's conception of Mars Observer at Mars.  It wasn't carrying any money.  Courtesy NASA.

 Finally,  few of us, myself included, fully understand the true benefits we have received from NASA's exploration of the cosmos.  There's the intangible...the wonders of the universe revealed to us...a broader understanding of our own cosmic significance...and a sense of connection with something beyond ourselves.  But let's talk turkey here.  Or perhaps LEDs.  Or scratch-resistant lenses.  Or aircraft anti-icing systems.  Or fire-resistant reinforcement for buildings.  Or firefighting equipment.  Or water purification.  Or solar energy.  Or...okay I think you get the point.  Hundreds of things we use in our everyday lives are made better thanks to technological advances made by NASA in preparing missions.  Those new products and ideas are then made available for companies in the United States to use - by law, NASA cannot charge for them or hold any claim on them.  So the next time you feed your little one nutritious, enriched baby food or you drive safely on the highway in slippery conditions thanks to roadway grooving or radial tires...remember that NASA made those things possible.

A Left Ventricular Assist Device, used by patients awaiting heart transplant.  NASA engineers applied technology developed for the space program to make these devices smaller and more energy efficient, allowing transplant patients to lead normal lives while awaiting a new heart.  Courtesy NASA.

 As I climb gingerly off my soap box, let me say this.  The financial problems faced by America are serious, and cutting of the budget will certainly be required.  NASA is by no means perfect, and there is always room for improving the way it uses the money it is allocated.  But we need to consider long and hard whether in the long run we can safely do without NASA and its scientific research and development of new technologies.  And indeed...the wonderment of discovering the universe around us is truly priceless.

Well, it's rainy (again), lunchtime, and in a few hours I'll be judging a science fair.  Plus I need to grab some protein so I can be ready next time someone needs a good lecture from a soap box.

See you in two weeks!
Carpe noctem...at least once the clouds clear out.
Kelly

Resolved

Happy New Year everyone!

I hope your 2013 has gotten off to a great start.  For many of you, that may mean making some New Year's Resolutions.  I've never been much for them myself...I often find my enthusiasm for them wanes rapidly after the New Year's celebrations are over.  But if you find yourself in need of some resolutions this year...I humbly present to you these recommendations.

New Year's Resolution #1: Resolve to be more in touch with the universe around you.
Back in the day, humans were very in touch with the universe.  It was our clock, our calendar, a source of wonder and the home of the gods.  Today, many of us go through our lives without ever taking the time to look up.  Make it a mission to spend some time under the stars this year.  We can help!  Every second Saturday of the month, the museum hosts a Star Party.  The first one in 2013 is on January 12 - we'll look forward to seeing you!  Star Parties are FREE and everyone is welcome.

New Year's Resolution #2: Resolve to see some shooting stars.
Virtually every year there's a really good meteor shower to see...and 2013 is no exception.  This year, the Perseids are on tap to put on an excellent show, and that's great news for all you folks who hate having to be outside in the freezing cold weather to do your stargazing!  The Perseids peak on August 12th, so you'll be able to spend a balmy evening in your shorts and t-shirt watching "stars" fall from the sky!  On that night, the Moon will be just past first quarter and will set early, so you can drag out a lawn chair and stare upwards for the rest of the night with nothing to dim your view of the heavens (just get away from any city lights near you).  Some models are predicting a bump up in rates for the Perseids this year, so this one could be pretty neat.  Remember - no telescope or binoculars are needed; the more sky you can see, the better.  Put your back to the constellation Perseus and enjoy the show.

A bright Perseid meteor streaks across the sky.  Image by Stefano DeRosa

New Year's Resolution #3: Resolve to use that telescope in the closet to see something cool.
So many of us have a telescope sitting somewhere gathering dust.  Well, this year, you need to get it out and have it set up and ready to go on Friday, October 11, no later than 11:30pm.  Point it at Jupiter as early as you can, and watch.  Slowly but surely, the shadows of not one, not two, but THREE of the largest Jovian moons will make their way across the giant planet.  A triple eclipse for Jupiter...a triple shadow transit for those of us here on Earth.  It should be a lovely sight in a good sized telescope.

A rare triple shadow transit on Jupiter on March 28, 2004.  Image by Sid Leach.

New Year's Resolution #4: Resolve to watch a rocket take off.
If you can get to Cape Canaveral on November 18th, you'll have the opportunity to do it in person!  If not, tune in NASA TV and watch the launch of MAVEN: the Mars Atmosphere and Volatile EvolutioN mission.  MAVEN will study the Martian atmosphere to see how the loss of materials to space has affected Mars over its long history.  Launches are always cool to watch, and this one should be no different.

An artist's conception of the MAVEN spacecraft orbiting Mars.  Courtesy NASA.

New Year's Resolution #5: Resolve to see the comet of the century...maybe...
There's already a buzz in the astronomical community about Comet ISON - it could be the most amazing comet North America has seen since Hale-Bopp...or it could fizzle.  Currently located beyond Jupiter, this newly-discovered comet is making its way toward a close encounter with the Sun.  If it holds together, it could put on an incredible show during the last two months of 2013.  Early predictions indicate that Comet ISON could reach negative magnitudes (bright like Jupiter or Venus), or even outshine the Moon (2nd brightest object in the sky!) and have a gorgeous tail visible to the unaided eye for weeks or even months.  Other early predictions say it could completely collapse under the pressure of the Sun's light and heat and be a total washout.  The only way to find out will be to watch the skies.

The orbital path of Comet ISON.  Courtesy NASA.

So there you have it - five astronomical things to resolve to do in 2013.  Whatever you choose to do, may 2013 be a year full of joy for all of us.

Carpe noctem!
Kelly

Beautiful...exciting...and short

Much better than nasty, brutish and short, don't you think?

Forgive my absence, dear readers, but I've been traveling for several weeks and the internets have not always been kind to me.  I couldn't get internet at all for the first few days, and then once I could, no power in the universe was allowing me in to my blog.

But back home again and trying to get caught up, I had to take a minute to share this with you in lieu of the post I should have made a week ago and more.  Please enjoy, and watch for regular postings beginning again this coming Wednesday!

Curiosity photographs itself (at least in part) on Mars.  Courtesy NASA.

Be sure to click the link above and watch the video.  And to think some people believe scientists are boring.
 
Carpe noctem!
Kelly

COSMIC STRINGS ALERT: Transit of Venus!

Red alert!  Red alert!  All hands to battle stations!

Hee hee, I've always wanted to say that.

Okay, seriously...I'm posting a special update to make sure all of you out there in internet land are aware of the incredible astronomical event taking place next Tuesday.  On the late afternoon/early evening of June 5, we have our last opportunity to witness Venus cross directly in front of the Sun.  Such events are called transits of a planet, and this will be the last one Venus will consent to do in our lifetimes...unless any of us plan on living 105 more years (Adam Savage excepted, of course).

So what is it we are going to see on June 5th?

The 2004 Transit of Venus.  Photo by Jay M. Pasachoff.

Venus orbits the Sun closer in than we do.  It's the second planet from the Sun...we're the third.  So on June 5th everything is going to line up just right to allow us from here on Earth to see Venus silhouetted against the solar surface.  Normally, this doesn't happen.  The solar system is not perfectly aligned - everybody is just slightly off kilter - and so usually Venus passes above or below the visible surface of the Sun from our perspective.  Mercury can do this too - it's the closest planet to the Sun, and moves faster than Venus, so the alignment works more often.  But Mercury is much smaller than Venus (and in fact, smaller than several of the larger moons of the solar system), making it much more difficult to see against the solar surface.  Venus is bigger and closer to us, so the perfectly round black dot of Venus will visible to the unaided (BUT NOT UNPROTECTED!!!) eye.

Notice the yelling up there?  Please, please, do not attempt to Venus the transit of Venus without proper eye protection.  This can result in PERMANENT eye damage.  Sunglasses are not enough, nor is it safe to look at the solar surface during sunset when the Sun is red.  The only safe ways to view the transit are by projecting an image of the Sun, protecting your eyes with solar eclipse glasses or shade #14 arc welder's glass, or using an endcap solar filter on your telescope.  Any other method can be terribly dangerous, so please don't attempt it.  If you're not sure if you have the right equipment to safely view the Sun, contact us at the museum.  We can help.

Okay, so what's the big deal?  A dot on the solar surface.  So what?

So what!!!???!  It's AWESOME!  You're watching a planet cross in front of its star!  WOOT!  That would be the geek explanation of why this is so cool.

Historically, transits of Venus gave us a yardstick by which to measure the sizes and distances of our own solar system.  If you can measure the size of the disk of Venus against the size of the disk of the Sun, and measure how long it takes for Venus to cross the disk of the Sun, you can use that information to calculate a whole bunch of things...most importantly, the distance between the Earth and the Sun.  Since getting out your tape measure and walking to the Sun is...well...highly problematic...transits of Venus gave us the best way of measuring distances in the solar system prior to spaceflight capabilities.

In the 21st century, we've become very interested in planet transits...around other stars.  The Kepler telescope looks for the tell-tale drop in brightness from stars that have planets crossing in front of them, as the planet prevents some of the light from the star from reaching the telescope.  The transit method has allowed us to discover numerous other solar systems in our galaxy...and perhaps one day will aid in us finding another Earth-like planet somewhere out there.

NASA's Kepler Mission.  Courtesy NASA.

If you're looking for some help in viewing the transit, we've got you covered.  We're hosting a special "Dinner with Venus" event, as the transit will begin around 6pm and continue well past sunset (of course, we won't be able to see the Sun after that, so our viewing will be over).  Tickets are $30 per person and include an all-you-can-eat dinner buffet at the Wild Side Cafe, eclipse glasses, telescope viewing of the transit (or internet viewing if the weather goes bad), prize drawings and more.  Space is limited, so contact us today to reserve your spot.  And if you can't get here - get outside on June 5 and watch the sunset with PROTECTED eyes - you'll get a bit more than you bargained for!

Carpe diem et noctem!
Kelly

Welcome to Mesozoic Park

Honestly, when you get right down to it, that's what eccentric billionaire John Hammond should have named his theme park.  Let's face it - not all dinosaurs lived in the Jurassic, but all dinosaurs lived in the Mesozoic. 

So what's up with the dinosaur talk, you ask?  Well...summer is nearly upon us.  I can't believe it, but this weekend is the unofficial start of summer (Memorial Day Weekend) and the beginning of the long crazy summer schedule we run here at the Abbitt Planetarium until Labor Day rolls around.  This summer is certain to bring three things to the Virginia Living Museum...heat, humidity, and Dinosaurs!

Indeed, as the days lengthen, the dinosaurs are moving in to the changing exhibit gallery.  We'll once again be featuring the big moving and roaring critters that have always been so popular here at the museum.  An added bonus this year...non-dinosaurs!  You might not be aware of this, but all dinosaurs lived primarily on land.  Flying reptiles, like pteranodon, we not dinosaurs.  Neither were marine reptiles like elasmosaurus and mosasaurus.  You can see all three of these "dino-buddies" at this year's exhibit.

1916 Pteranodon painting by Harder.  Courtesy Wikimedia.

Want some extra dinosaur fun?  Consider joining us overnight on June 1 for Dinosaurs!  The Camp-in!  Yes indeed, you'll get to sleep overnight in the museum and learn more about dinosaurs than you ever thought possible.  It's going to be a whole lot of fun.  To get more information or to register, call Betty or Julia at (757) 595-9135.  There are only a few spaces left available - trust me, you don't want to miss this.

The planetarium will be getting in on the dino action as well, with our featured program "Dinosaur Prophecy."  We've got a brand-new opening segment focusing on the wonders of the summer night sky, and then we investigate four fossil sites to learn how dinosaurs lived and died, and what their demise might say about the fate of humanity.  It's a pretty amazing show...especially the parts where dinosaurs thunder across the dome thanks to some amazing animations!

For those not ready to walk with dinosaurs, we've got some other options in the planetarium as well.  With this year being the 100th anniversary of the sinking of the Titanic, we take you on a journey through the final days of the doomed vessel with "Night of the Titanic."  As always, "Virginia Skies" will take you on a live, guided tour of the evening skies for the day of your visit.  Rounding out the planetarium offerings through the end of June will be an all-new laser show especially for kids - "Here Come They Might Be Giants."  If your kids like the albums and videos produced by these awesome rockers, they'll be entranced by this laser show.  And if you've never experienced TMBGs kid-friendly music...don't miss this show.  You're in for a real treat.

Finally, I would be remiss not to mention the successful launch of the Dragon capsule currently in orbit around the Earth by private space exploration company SpaceX.  Currently America's only means of getting into low-earth orbit, we're excited to see this program moving forward.  Watch the news on May 25th, as the Dragon capsule will be attempting to link up with the International Space Station on that day.  Best of luck for a smooth docking, guys!

SpaceX's Dragon capsule launches with their Falcon 9 rocket on May 22, 2012.  Courtesy NASA.

There's a lot happening here at the museum this summer, astronomically speaking and otherwise, and I'll be posting updates as needed to keep you informed about it all.  If you're not already signed up to receive updates from my blog, you might want to do that now, as I might be running a bit off my usual every other week schedule for a while.  But right now, I've got more work to do to get ready for the dinosaurs.  See you in two weeks!

Carpe noctem,
Kelly

Mars Attacks!

Well, actually, when you get right down to it...we're the ones attacking Mars.

Even as I write, the latest in a long series of robotic explorers is on its way to the Red Planet.  The Mars Science Laboratory, with its already-famous rover, Curiosity, launched toward Mars on November 26 of last year and is expected to touch down on the Martian soil in the wee morning hours of August 6, 2012.  If you're a devotee of Mars-exploring robots, you can sit up and watch the landing at the Virginia Air & Space Center, NASA Langley's Visitor Center.  Some folks from the Virginia Living Museum will be on hand too, discussing the ever-popular question of whether life ever got a foothold on Mars.

Mars is a tough planet to land on.

The road to Mars is a hard one, and landing on the surface is an even greater challenge.  Kind of like the superstitions surrounding the Scottish Play in the theater world, there's a long-held fear of Mars in the space exploration community.  It is definitely picky about what probes it chooses to welcome.  Half of all the missions ever sent to the Red Planet have ended in failure.

Russia's Phobos (meaning fear; also the name of one of Mars' two moons) 1 and 2 both suffered from the "Mars Curse."  Phobos 1 died of a software glitch - it lost its lock on the Sun, and since it was running on solar power, that was the end of that.  Phobos 2 seems to have suffered a similar fate - after a successful Mars orbit insertion and just prior to the scheduled release of two landing probes, contact was lost and never regained.  While the official explanation is an onboard computer failure...the subject of alien tampering was raised, and has never really been silenced.

The last image taken by the Phobos 2 spacecraft.  The dark object is often claimed to be a UFO responsible for the loss of the craft, but is most likely a distorted shadow of the craft itself on the surface of Mars.

The U.S. craft Mars Observer was also mysteriously lost.  Three days before a planned Mars orbit insertion, engineers lost contact with the spacecraft.  We'll never know exactly what happened, but the most likely cause seems to have been a ruptured fuel tank which sent the craft into a massive tailspin.

Russia tried again with Mars 96, with disastrous results.  The fourth stage of the rocket failed to ignite, and the whole kit and caboodle came crashing back down to Earth.  The bulk of the craft seems to have landed in Chile, though no pieces of it were ever recovered.  Russian telemetry on the rocket was severely limited, and no specific cause for the crash was ever identified.

The Japanese tried reaching Mars with the Nozomi (meaning Wish or Hope) spacecraft, but a malfunctioning valve resulted in a loss of fuel so great that the poor craft was left with insufficient fuel to reach Mars orbit.  Some science did come out of the mission though - Nozomi was able to make 2 successful fly-bys of Earth and one of Mars.

Probably the most embarrassing loss of a spacecraft goes to the United States and Mars Climate Orbiter (MCO).  MCO was lost when it traveled out of communications by passing behind Mars 49 seconds earlier than expected.  Contact with the spacecraft was never re-established.  Turns out that while the spacecraft software was written expecting flight data in metric units, engineers on the ground were uploading the data in English units.  The spacecraft ended up flying too close to Mars, and likely disintegrated in the Martian atmosphere.  Oops.

We didn't do much better with Mars Polar Lander (MPL).  Contact with the spacecraft was lost during the descent phase as MPL tried to land at the Martian South Pole.  We never heard from the spacecraft again.  No trace of the craft was ever found, but the official explanation for the loss states that vibrations during the descent phase may have tricked the lander into thinking it was on the ground, and it shut off its thrusters, causing it to plummet the last 130 feet or so to a very hard, fatal landing.

Even the British have had trouble with Mars, losing a lander, Beagle 2 (named for the HMS Beagle, the ship that carried Charles Darwin on his famous voyages).  No explanation or cause has ever been agreed upon - the little lander simply disappeared and never made contact after descending towards the surface of the Red Planet.

Clearly, entry, descent and landing (EDL) is a tough time for a Mars-bound spacecraft.  NASA engineers often call the EDL phase the "7 minutes of terror."  This Saturday, we here at the Virginia Living Museum are going to be celebrating Mars with our monthly star party and laser light night...and we've got a special guest planned - NASA!  Exhibits all about Mars and Earth will be available, and Jill Prince, NASA's Mars EDL expert, will be giving a special talk about the 7 minutes of terror.  If the weather holds, we'll be looking at Mars with our telescopes all evening (plus peeking at Venus and Saturn too, I'm sure!), and there will even be a bit of Mars-themed music in the planetarium with Laser Mania!

So come join us for some Mars Mania this Saturday!  Mars activities and exhibits open at 5:30pm, Jill Prince speaks in the planetarium at 6pm, and observing begins after sunset.  All are FREE!  In the planetarium: at 7:30pm enjoy Virginia Skies (with a focus on Mars); 8:30pm see Laser Mania featuring "Attack of the Radioactive Hamsters from a Planet Near Mars" by Weird Al Yankovic; finish the night with a Laser Pink Floyd double feature: The Wall at 10pm and Dark Side of the Moon at 11:30pm.  All planetarium shows are $6, $10 for any two.  Members are always half price!

Don't forget to watch the news for information on the Mars Science Laboratory landing in August...and let's hope the Great Galactic Ghoul keeps his mitts off this one.

Carpe noctem!
Kelly

Giving Thanks

Happy Thanksgiving everyone!  Since I'll be off tomorrow, preparing to enjoy the holiday with my family, I figured I'd post a day early, and keep it all on the Thanksgiving theme.

As you've likely come to expect from this blog, there also needs to be a generous dollop of humor, so in honor of Thanksgiving and with apologies to David Letterman...

From the home office in Milliways, the Restaurant at the End of the Universe, here's my Top Five List of spacey things I'm thankful for this Thanksgiving.

5. The Abbitt Planetarium
Yep, I'm thankful for my job!  And not just for the usual it-pays-the-bills reasons either.  I'm one of those lucky people who truly has their dream job.  I get to work with people of all ages and share with them my love of the universe.  I get to exercise my creative drives and make shows in the planetarium on numerous different topics.  It's like being a Hollywood director without the pressures of Hollywood.  What more could I ask for?  And thank you to all of you who come to visit us and make it possible for me to continue to do what I love.

4. The Hubble Space Telescope
Hubble is truly one of the most remarkable spacecraft ever launched.  It's the telescope with 9 lives (at least!) and has provided us with innumerable stunning images of the cosmos.  It has survived not only the rigors of being launched into space aboard the space shuttle, but also numerous servicing missions designed to repair and upgrade its instruments.  When the initial flaw in the primary mirror was discovered shortly after launch, many people figured the Hubble was a loss.  Thanks to some amazing work by both engineers and astronauts, Hubble's flaw was repaired and for over 20 years this school-bus-sized scope has continually made our jaws drop with its incredible images.

Dying star V838 Mon.  Courtesy STScI/NASA.

Jupiter and its moon, Ganymede.  Courtesy STScI/NASA

Supernova 1987A.  Courtesy STScI/NASA.

Hubble is in decline now, since NASA has retired the space shuttle - the only vehicle which could be used to service the telescope.  Over the coming years, Hubble's systems will slowly degrade, until a final critical failure of some kind renders it useless.  Its successor, the James Webb Space Telescope, is mired in funding problems as NASA struggles to maintain itself in these fiscally trying times.  Whether JWST makes it up or not, when Hubble images its last, I for one, will shed quite a few tears.  No other instrument, before or since, has done what Hubble can - inspire us all with wonder at the visions of the universe it provides.

3. The Apollo Missions to the Moon
We've been to the Moon.  Men from Earth have stood on the surface of the Moon and looked up at the fragile blue planet we call home.  It was real, we went there.  It was not, as so many people believe, an elaborate hoax.  And it is one of the most inspiring stories of human exploration ever.

Astronaut Buzz Aldrin on the lunar surface.  Courtesy NASA.

Exploration is always challenging.  But in reaching for the Moon, we had to overcome seemingly insurmountable obstacles.  There is no water or air on the Moon.  Gravity is dramatically less, so machines behave in different and unexpected ways.  We had no idea what the surface of the Moon was like, or how men would react - physically and psychologically - to being in space or on the lunar surface.  And yet, in the space of a decade, we went from dreaming about it to being there.  I hope one day, NASA will be able to have that kind of drive and vision again.  If you don't know the story of our journey to the Moon - check it out.  It's worth it.

2. The Night Sky
There's something entirely captivating about a dark night sky.  Looking up at the stars is a wonderful, peaceful thing to do in a world that sometimes overwhelms us with activity.  And sharing it with someone you love, or even someone you're never met, makes the experience all the more special.  My daughter and I have looked at the sky since she was a tiny baby.  If you've never enjoyed a dark night sky - here's a goal for the new year.  Attend a star party.  Look through a telescope for the first time.  Just go outside one night and look up for a while.  And when you do, remember that all of humanity shares that sky with you.  No matter how far away, no matter how long ago they lived, everyone everywhere has seen the same stars that you can see just by looking up. (I miss you, Dad.)

The arc of the Milky Way in California photographed by Tony Hallas.  Courtesy Astronomy Picture of the Day.

We're in danger of losing our night skies forever as we turn on more and more nighttime lights.  Losing the sky means losing a powerful part of our heritage.  Don't wait too long to see it - or it might not be there for you to enjoy.

And the Number One spacey thing I'm thankful for this Thanksgiving...

1. The Mars Curiosity Rover
We're headed back to Mars!  Mars is a simply fascinating planet, and our exploration of it has only made it seem more intriguing.  While we've found no canals or war-like Martians, we have found tantalizing evidence of massive amounts of water having once covered the Martian surface...and even indications that there once may have been...and even yet may still be...life on our rusty red neighbor.  The Curiosity rover is due to launch on November 25th, with a eye to landing on the Red Planet this fall.  I can't wait to see what amazing new discoveries it will show us.  Stay tuned!

The Curiosity Rover.  Courtesy NASA/JPL.

I wish you all a safe, happy, and joyful Thanksgiving!
Carpe Noctem!
Kelly

Over the Moon

Actually, I'm kind of not.

We had an amazing night last Saturday, observing the Moon.  The NASA exhibit was awesome...I touched a piece of the Moon!  Our Moon is incredible!

And that got me thinking...what about all the other moons?  Does anybody realize how incredibly awesome they are?

We tend to focus on our own Moon.  Makes sense...it's big, bright, and plays an important role in the existence of life here on Earth.  But among the major planets there are 168 other moons...all equally fascinating worlds in their own right!  So let's explore some of the other moons out there...and kind of play a little compare and contrast with our Moon, if you will.

Earth has one moon.  That's it...just The Moon.  Most of the other planets have many more moons indeed...Jupiter takes the prize for the most (if you don't count ring particles!) at 64 known satellites.  Even Mars has 2 moons - double what we've got!  The only planets with fewer moons than Earth are Mercury and Venus - neither world has any moons at all. 

Size matters though...Mars' two moons are extraordinarily tiny.  Phobos (Fear) and Deimos (Panic), as the Martian moons are named, are most likely captured asteroids.  They are small potato-shaped bodies, barely findable in a telescope from here on Earth...and even then only when Mars makes a close approach to us.  Such jagged chunks of stuff can be found orbiting all of the gas giant planets as well...the majority of the solar system's moons are weird little lumpy leftovers from the formation of the planets.

Phobos (top) and Deimos (bottom).  Courtesy NASA.

On the other hand, our Moon is not the largest in the solar system, either.  That distinction goes to Ganymede, largest moon of Jupiter.  In fact, Ganymede is larger than the smallest major planet...at 3,280 miles across it beats Mercury's size by more than 200 miles.  This massive moon is truly a world in its own right...it shows evidence of tectonic activity, its own magnetic field, and it might even have an atmosphere.  Talk about your colossal moon!

Ganymede from the Galileo spacecraft.  Courtesy NASA.

Speaking of atmosphere, our Moon hasn't got one.  If you plan on visiting the Moon, make sure you bring your own air.  The moon with the densest atmosphere?  Saturn's enigmatic Titan.  The moon, explored by the Huygens lander, has the distinction of being the only moon known with an atmosphere consisting of more than trace gases.  It is a dense soup of hydrocarbons, with numerous distinct layers...shrouding the moon and looking like a heavy layer of orange smog.  So impressive is this moon's atmosphere that it is believed to be, like Venus, a super-rotator - that is, the atmosphere actually rotates much faster than the moon itself does.  The Huygens probe showed us incredible details about Titan, but so much more remains to be learned.

Titan from the Cassini spacecraft.  Courtesy NASA.

The surface of Titan from the Huygens probe.  Courtesy NASA/ESA.

Keep in mind, we've limited ourselves at this point to explore the moons of the major planets.  There are more moons than that in the solar system!  Of the 5 confirmed dwarf planets, 3 have moons: Eris has Dysnomia, Haumea has Namaka and Hi'iaka, and Pluto has Charon, Hydra, Nix, and the newly discovered P4 (it's so new it doesn't have a name yet!).  Pluto is only 2/3rds the size of our Moon - and it has 4 moons of its own!  Incredible!

Pluto and its 4 moons from the Hubble Space Telescope.  Courtesy NASA.

Oh, so you think only planets, be they major or dwarf, can have moons?  Not so...the asteroid Ida has a moon, Dactyl, first discovered by the Galileo spacecraft as it passed by on its way to Jupiter.  The solar system is rich with moons!  Take some time to explore them...both by reading up on them and by checking them out through telescopes - the moons of Jupiter and Saturn can easily be seen in telescopes from Earth!

Ida and its tiny moon Dactyl from the Galileo spacecraft.  Courtesy NASA.

Have fun mooning around, and I'll see you next time!
Carpe noctem,
Kelly

A Day Late and a Dollar Short

Oops.

You know, I've been so proud of myself for keeping this up...even posting a day early when I know I won't be around on a Wednesday...

So imagine my shock when I looked ay my calendar and saw the "Update Blog" icon proudly displayed across...YESTERDAY!  ACK!  Talk about a good time for a time machine...now would be it!  Or even a good improbability drive...no?  Well, guess I'll just have to take my lumps and admit to being a day late.  I blame it on the calendar program...I'm quite sure that banner wasn't there yesterday.

Anyway, I'm back today!  Let's talk about something spacey!  Specifically, let's talk about what's going on in the sky for this month.

The sky is still desperately clinging to more water than I would like.  I'm waiting for the final break in humidity...the one that announces in no uncertain terms, "okay, Fall has arrived!"  The autumn months are excellent for stargazing...it's cool, but not too cold...the sky is clearing up and visibility improves...sunsets are coming steadily earlier, giving us more nighttime to enjoy.

One of the most prominent objects in the sky right now makes its appearance in the late evening sky in the east.  It rises up, brilliant white and very steady, and more than a few people have wondered if they are seeing a UFO!  Don't worry though, it's not an alien invasion.  It is instead the regal planet Jupiter.

Jupiter is one of the brightest objects you'll ever see in our night sky; fourth behind the Sun, the Moon and Venus.  Combine that brightness with a still-soupy atmosphere and you can get some strange effects.  Normally, the planets don't twinkle.  Twinkling of stars is caused by the tiny bit of light we receive from a star getting jostled about by the moving air of the Earth - so naturally, twinkling is more intense under humid or smoggy conditions.  Planets are much closer to us than the stars, so their light tends to be stronger, and less affected by the air.  But on a humid night, even a planet can seem to fiddle, fidget, wink, flash colors, or move about slightly thanks to atmospheric effects.  Add that to our tendency to squint at something to try to "bring it into focus" and it's not hard to see why magnificent Jupiter has been mistaken for an alien spacecraft.

Jupiter.  Courtesy NASA.

Another spacecraft Jupiter (and Venus, too) is often confused with is the International Space Station.  The ISS is quite bright, occasionally even exceeding Jupiter's brightness as it crosses our sky!  However, there's a big difference between Jupiter (or any planet) and the ISS - speed.  Planets are stationary, by and large.  Oh sure, they are orbiting the Sun, just like we are, but you won't notice that motion when looking up at a planet at night.  If you stand and stare long enough (maybe an hour or two), you will notice that planets, like all other celestial objects, move slowly across our sky.  This is thanks to the rotation of our very own planet Earth - and that's why all natural objects cross the sky from east to west.  The Sun, The Moon, the stars, the planets...everybody appears to move east to west across our sky thanks to the Earth's own rotation on its axis.

 The International Space Station.  Courtesy NASA.

Spacecraft, however, move thanks to the initial kick from the rockets that got them up into orbit and the gravitational pull of the Earth.  So not only can they move in pretty much any direction we choose to set them, they can also move much, much faster than the rotation of the Earth carries objects across our vision.  The ISS, for example, circles the world in about 90 minutes, meaning that it will cross your patch of sky in about 5 or 6 minutes or so.  How can you distinguish the ISS from a plane?  Easy - planes always have some kind of blinking light.  The ISS will move fast, and shine rock steady.  The best way to be sure you're looking at the ISS is check with the excellent satellite tracking website www.heavens-above.com.  You'll need to tell them your location - latitude and longitude are best if you have them (try Google Earth for help) - and then they'll tell you when and where you can look up to see satellites whizzing by over your head.  If you've never done this before, be warned - it is very fun and highly addictive!

Before I go, let me share some exciting news about Jupiter for those of you with telescopes...the South Equatorial Belt is back!  Jupiter's rapid rotation for such a large planet (the gas giant is ten times the size of Earth but rotates once in under 10 hours!) causes its clouds to form into huge stripes around the whole planet.  Most of the time, these stripes are pretty constant - there are usually a couple large dark reddish belts around Jupiter which contrast beautifully with other whitish stripes.  Recently, the southern belt decided to take a vacation, disappearing from telescopic view for quite some while.  Now, whatever weather processes on Jupiter that allow such things to form have kicked back in, and the SEB is returning beautifully.  So check out Jupiter with your telescope (or even binoculars!) and enjoy the show.

Well, I guess that catches us up for now...and I promise to be on time in two weeks.
Carpe noctem!

Kelly

The Little Robot that Could

Greetings all!

I've got a friend who loves little robots.  And no, it's not Grant Imahara.  She's a science educator here at the museum with me.  And I have to confess, I totally understand.

There's something wonderful about a little, plucky machine, doing its job despite all obstacles.  Maybe that's why we love movies like Wall-E so much - little robots are just so darn cute!  Okay, so I'm anthropomorphizing...a lot.  But I can't help it.  Because the subject of this post is a truly amazing little robot - MER-B, better known as the Mars-exploring robot Opportunity. 

An artist's conception of Opportunity on the surface of Mars.  NASA

It's hard to believe, but Opportunity and its twin sister, Spirit, arrived on Mars in January 2004.  That's right - this rover, which was designed for a 90-day mission, has now been traveling around on the surface of Mars for over seven years.  That right there is reason enough to love this intrepid little robot.

The science achievements from the Mars Exploration Rover program have been nothing short of extraordinary.  We've learned an incredible amount about Mars and its history.  Thanks to the rovers, we know that Mars did indeed have a wet past, and most certainly still has water which occasionally makes a surface appearance.  Opportunity discovered the first meteorite on another planet - Heat Shield Rock - while investigating the site where its own heat shield landed.  The rover has traveled about 20 miles across the surface of Mars, inspecting rocks, digging holes, taking photographs and measurements, and performing numerous other scientific tasks.  It has survived dust storms, a cranky shoulder joint, and even getting stuck in a sand dune for a time.  Its exploits are far too numerous to detail in this space, but I strongly encourage you to read about them.  Opportunity's story is an incredible one, full of achievement, drama, and most of all, the strength and determination of her human crew back here on Earth.

I felt it was time to interest people in the Mars rover again, because Opportunity has achieved quite a milestone in the past few days.  It has been traveling toward Endeavour Crater on Mars for three years, and at long last, arrived at the massive hole in the Martian surface just last week, sending back this lovely photo.

The far rim of Endeavour Crater as seen by Opportunity.  NASA.

Thus Opportunity begins another new chapter in its long and varied history.  Its twin, Spirit, sadly has ended its mission, and has been out of contact with NASA for more than a year.  But Opportunity seems to still be going strong.  I hope this "Little Rover That Could" keeps on keeping on for a long, long time to come.

If you'd like to see Mars, and wave hello to the rover, check your early morning skies.  Mars shines in the eastern sky before sunrise, looking like a dull orange or yellowish star.  Keep watching it, because Mars and Earth are now approaching each other rather than receding, so the Red Planet will grow steadily in size and brightness in the coming months.  While Opportunity may not be able to see you, nor you see it, it's incredible to think that as you look at a small planet millions of miles away, something made by human hands is driving along, helping us discover the wonders of another world.

Until next time,

Carpe noctem,

Kelly