Earth and Space Science - Origin and evolution of the universe

  • Dunewatching, Martian style
    Dunewatching, Martian style

    New pix from Mars show sand dunes on the move. Mars has been dry for 1.5 billion years; could massive erosion be due to wind? Yes, says a new report that tracked dunes with precise new images. Surprise: dunes move as fast on Mars as on Earth!


    Thursday, May 10th, 2012
  • What we did on our summer vacation: Visit Mars!

    It’s a boom time for studying Mars, and the perfect time for the be-all, end-all summer vacation. Ride a robot rover. Dune-buggy an unearthly dune field. Even meet-and-greet a real live Martian! All aboard for Mars!


    Thursday, July 26th, 2007
  • Star-Burst Fills Empty Hole

    Where did all the dust come from? If you are interested in the origin of planets and human beings, here’s evidence that a star explosion made mucho dust.


    Thursday, June 15th, 2006
  • Astronomical Conundrum: Is this a Planet?

    Losing count: New study finds object larger than Pluto in the distant solar system. Do we now have 10 planets — or 8?


    Thursday, February 2nd, 2006
  • A Bar in the Galaxy! Milky Way’s secret spot

    Think you know the Milky Way, our home galaxy? Think again. There’s a large bar at the center, and it’s open for business. It might even be feeding a black hole… Meet the newest galactic doo-dad…


    Thursday, August 18th, 2005
  • Saturn’s Secret: Lightning

    Cassini finds lightning strikes on Saturn, haze on moon Titan, dust between the rings, and new rotation rate.


    Wednesday, December 22nd, 2004
  • Planet Formation

    New view of crystals that form into planets in protoplanetary disks. Which came first, the planet or the crystals?


    Wednesday, November 24th, 2004
  • Amateur Astronomy: Big Contribution

    Amateur astronomers watch variable stars, asteroids, comets — helping create a better picture of the universe.


    Thursday, September 9th, 2004
  • Ancient Universe Seen

    Astronomers have just seen galaxies from the first billion years of the universe. They are also racing to understand dark energy, the force that’s spreading the universe apart.


    Thursday, March 11th, 2004
  • Saturn’s Ring Thing

    Why don’t the rings of Saturn just disappear over millions of years. It’s the recycling, that’s why!


    Thursday, December 11th, 2003
  • X-Ray Astronomy #2: It’s Results Time!

    Chandra, the X-ray astronomy telescope, is three years old. We ogle some of its greatest hits. Caution: These bangs are BIG!


    Thursday, September 5th, 2002
  • Mars Has Big Ice!

    Scientists have found ice on Mars. The frozen water, whose quantity may equal Lake Michigan, is within a meter of the surface.


    Thursday, May 30th, 2002
  • Sun’s Story: Meet our Star!

    New techniques give a better view of the sun, help predict flares, aurora and destruction from the sun. Like staying warm? Like radio? Love our sun!


    Thursday, July 27th, 2000
  • Killer Asteroids: Ultimate Impact

    New searches are finding lots of asteroids. None of them are aimed at us — yet. How much damage have asteroids done in the past?


    Wednesday, November 4th, 1998


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