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! More »

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! More »

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. More »

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… More »

Saturn’s Secret: Lightning

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

Planet Formation

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

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. More »

Saturn’s Ring Thing

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

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. More »

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! More »

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? More »