Great Image: Colliding Spiral Galaxies

The image above is from NASA's Astronomy Picture of the Day website and represents the combination of galaxies, a process that will continue for billions of years.  Our own Milky Way galaxy has abosorbed other galaxies in the past and is expected to have more collisions in the future.  Here is the story for the image above:

Billions of years from now, only one of these two galaxies will remain. Until then, spiral galaxies NGC 2207 and IC 2163 will slowly pull each other apart, creating tides of matter, sheets of shocked gas, lanes of dark dust, bursts of star formation, and streams of cast-away stars. Astronomers predict that NGC 2207, the larger galaxy on the left, will eventually incorporate IC 2163, the smaller galaxy on the right. In the most recent encounter that about peaked 40 million years ago, the smaller galaxy is swinging around counter-clockwise, and is now slightly behind the larger galaxy. The space between stars is so vast that when galaxies collide, the stars in them usually do not collide.

Image Credit: Debra Meloy Elmegreen (Vassar College) et al., and the Hubble Heritage Team (AURA/STScI/NASA)

Opportunity Rover: A Cry for Attention?

With the Curiosity rover getting all of the attention these days, it was only a matter of time before the older Opportunity rover would pull a stunt to let us know she is still there (unlike her sister, Spirit, who is no longer functioning).  The two photos above are 12 days apart as Opportunity explores the Murray Ridge on the rim of Endeavour Crater (see bottom image).  Within that time a new rock appeared on the surface.

CNN and others were quick to report on a doughnut-sized rock that mysteriously appeared on the surface of Mars. The most likely explanation is that Opportunity kicked up the rock while traveling about.  But theories will always abound.  My theory is that Opportunity was getting a little lonely and wanted to let us know she is still working hard after all these years.

Luckily, NASA will hold a press conference later today to discuss the 10 year anniversary of the Opportunity mission on Mars.  The rover arrived on January 24, 2004.  Maybe that was all Opportunity really needed - a little appreciation. 

Note: For more images from Opportunity, visit the NASA Jet Propulsion Laboratory. 

Update:  And now, another cry for attention.  For some odd reason, someone is now suing NASA over the presumably dislodged rock.  A private citizen, Rhawn Joseph, filed a petition January 27th in U.S. District Court in northern California.  In his petition, Mr. Joseph stated,

Any intelligent adult, adolescent, child, chimpanzee, monkey, dog or rodent with even a modicum of curiosity would approach, investigate and closely examine a bowl-shaped structure which appears just a few feet in front of them when 12 days earlier they hadn't noticed it...But not NASA and its rover team who have refused to take even a single close-up photo. 

An interesting approach to science.  And you too still have time to sue NASA for all of the craters and rocks missed by the Apollo crews during their Moon visits many decades ago.  I do not believe there is a statute of limitations on craziness.  

NOVA: A Story About Exoplanets

Earlier this month PBS's NOVA had an good program on exoplanets called Alien Planets Revealed.  You can still view the show on NOVA's website, and here is a quick summary from that same site:

It’s a golden age for planet hunters: NASA's Kepler mission has identified more than 3,500 potential planets orbiting stars beyond our Sun. Some of them, like a planet called Kepler-22b, might even be able to harbor life. How did we come upon this distant planet? Combining startling animation with input from expert astrophysicists and astrobiologists, “Alien Planets Revealed” takes viewers on a journey along with the Kepler telescope. How does the telescope look for planets? How many of these planets are like our Earth? Will any of these planets be suitable for life as we know it? Bringing the creative power of veteran animators together with the latest discoveries in planet-hunting, “Alien Planets Revealed” shows the successes of the Kepler mission, taking us to planets beyond our solar system and providing a glimpse of creatures we might one day encounter.

Sadly, the Kepler space telescope is no longer searching the heavens after a mechanical failure in May 2103, but the wealth of information that it provided between 2009 and 2013 will keep scientists busy for many years to come.  The NOVA program discusses some of the finding, including Kepler 62F, the first promising earth-like planet to be discovered (see NASA artist concept below).  Kepler 62F is about 1,200 lights years away and the program makes it clear that it would take "many million years" for us to get there with our current spacecraft.  Given NASA cannot get a budget one year out, it is unlikely this Congress will be contemplating such missions (though I still vote we send a CODEL - or congressional delegation - on the mission anyway).  

The NOVA program also discusses how about 75 percent of the stars in the galaxy are red dwarves, which means the nature of life around other suns may be quite different from ours based on the light received on the surface of the exoplanets.  Some of the ideas about flora and fauna on these red dwarf exoplanets was pretty interesting. 

Another discussion point was how our own planet's life was nothing but microbes for billions of years, and therefore this is what we should probably suspect in terms of "life" on these exoplanets if there is life at all.  And the idea that intelligent life would evolve on such exoplanets is not a given.  NOVA uses the shark as an example of non-intelligent life staying pretty much the same over 400 million years.  Hence, life may be abundant in the universe without much or any of it being intelligent or at a stage of intelligence that can communicate with us.

After all of that, the program still leaves us with the point that one out of every six stars in our galaxy has an Earth-sized planet orbiting it, which puts the number of Earth-sized planets at about 17 billion for the Milky Way.  That gives us plenty of exoplanets to explore even with all the caveats above. 

Top Image Credit:  Exoplanet Eclipse/Bill Lile, quoted from: http://www.flickr.com/photos/blile59/313907609

A Rocket Tower to Nowhere

At a time when NASA is struggling to find the necessary funds to cover planned space missions, why is the Agency spending $350 million on a tower that is no longer needed?  The A-3 test stand tower at the Stennis Space Center in Mississippi is a piece of pork that local legislators insisted must be completed even though it is designed for rockets that will never be built since they are part of the canceled Constellation program.  Businessweek magazine reported that NASA's inspector general has been highlighting such waste of funds:

Testifying before the House space subcommittee in September, Martin highlighted the A-3 as an example of how lawmakers, looking to keep federal dollars flowing to their states, can block efforts to cut unnecessary spending. “The political context in which NASA operates often impedes its efforts to reduce infrastructure,” he said.

You can find more such stories of wast in the February 2013 NASA IG report, NASA's Efforts to Reduce Unneeded Infrastructure and Facilities. The report noted:

During our fieldwork we identified a variety of facilities at multiple NASA Centers that the Agency was not utilizing or for which Agency officials could not identify a future mission use. These facilities ranged from smaller, low value post-World War II era thermal vacuum chambers to newer rocket test stands that cost several hundred million dollars to construct.

We concluded that previous efforts by NASA to reduce its underutilized facilities have been hindered by: 1) fluctuating and uncertain strategic requirements; 2) Agency culture and business practices; 3) political pressure; and 4) inadequate funding. The combination of these forces has frustrated NASA’s efforts over the years to make meaningful reductions in the size of its real property portfolio. 

Either we want a space program or a jobs program, but trying to do both ties our hands and limits our reach as a nation.  We will always have some level of politics in anything that requires the involvement of Congress, but it may be time to let NASA focus on the future and not be hindered by leftover from the past.

Image Credit:  Bloomberg Businessweek

Extra Life for the International Space Station

The White House recently announced that the International Space Station (ISS), set to be decommissioned in 2020, will now get an extra 4 years of life through 2024.  In the press release, the White House stated:

[The extension] will allow NASA to complete necessary research activities aboard the ISS in support of planned long-duration human missions beyond low-Earth orbit—including our planned human mission to an asteroid by 2025 and to Mars in the 2030s.  NASA has determined that research on ISS is necessary to mitigate fully 21 of the 32 human-health risks anticipated on long-duration missions.  A related critical function of ISS is testing the technologies and spacecraft systems necessary for humans to safely and productively operate in deep space.  Extending ISS until 2024 will give us the necessary time to bring these systems to maturity.

On January 9th, NASA Administrator Charles Bolden reemphasized the role of the ISS in future space endeavors, making the following statement:

NASA is committed to the space station as a long-term platform to enable the utilization of space for global research and development. We’re committed to implementing a unified strategy of deep space exploration, with robotic and human missions to destinations that include near-Earth asteroids, the moon and Mars. And we are committed to our international partnerships and the continued peaceful uses of outer space and unlocking the mysteries of our vast universe.

Of course, Congress will still need to agree.  And at $3 billion a year in maintenance costs, added to the recent scares, will not make this an easy argument.  That said, the station represents a major piece of the American space program and after more than $100 billion in construction over more than a decade, to allow the station to become space junk earlier than necessary would be foolish. 

The extension would also benefit smaller start up firms, such as SpaceX and Orbital Sciences, that are still getting their legs as they build new spacecraft and begin the privatization of space (or at least low Earth orbit).  In fact, earlier today Orbital Sciences' Cygnus capsule successfully docked with the ISS to resupply its occupants.  The only question now is whether we will have space partners down the road.  China is already building its own space station and Russia has been thinking of doing the same. 

Abandoned Astronomy

Like the wrecked Mayan remains one finds centuries later in the Latin American jungle, this Bloomington, Indiana, space observatory represents time moving on even with the most modern of endeavors.  The Knightridge Space Observatory pictured above is a four-ton telescope built in 1936 and 1937.  You can see many more images like this one and the one below (the Pip Ivan Observatory in Ivano-Frankivsk, Ukraine) at io9.

Top Astronomy Stories in 2013

This is the time of year to highlight some of the great discoveries of the last year, and we have plenty to ponder.  CBS news highlights events such as the discovery of the Higgs Boson, life in Antarctic lakes, more evidence of water on Mars, and the Chinese moon landing.  I would add the Indian mission to Mars as another key event.

CNN’s list of 2013 scientific stories included the stray asteroid that hit the Russian city of Chelyabinsk in February 2013 (notice this is a story rather than a discovery, though the people in Russia certainly discovered something new about the risk of life here on the third rock from the sun).

Wired magazine covered both discoveries and stories, with discoveries including estimates that our galaxy may contain about 10 billion Earth-like planets (using data from NASA’s Kepler space telescope).  Top stories included Mars One, the plan to send humans one-way to Mars in 10 years, and the mysterious environment encountered by Voyager 1 at the edge of the Sun’s heliosheath.  Wired also discusses the diminishing availability plutonium-238, which may impact out ability to repeat Voyager-like missions in the future.