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News updated on 10/13/2010 at 3.27 PM EDT

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Astronomy Picture of the Day  |  International Year of Astronomy
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"The Amateur Astronomer's Introduction to the Celestial Sphere"

Cassini  |  Mars Exploration Program  |  MESSENGER  |  New Horizons

 

A giant star in a faraway galaxy recently ended its life with a dust-shrouded whimper instead of the more typical bang. More...

NASA's Hubble Space Telescope has captured the first snapshots of a suspected asteroid collision. The images show a bizarre X-shaped object at the head of a comet-like trail of material. More...

During a period of universal warming 11 billion years ago, quasars — the brilliant core of active galaxies — produced fierce radiation blasts that stunted the growth of some dwarf galaxies for approximately 500 million years. More...

NASA's Hubble Space Telescope has captured images of the large asteroid Vesta that will help scientists refine plans for the Dawn spacecraft's rendezvous with Vesta in July 2011. More...

In a new analysis of a lunar sample collected by Apollo 17, researchers have detected and dated carbon on the moon in the form of graphite -- the sooty stuff of pencil lead -- which survived from around 3.8 billion years ago, when the moon was heavily bombarded by meteorites. More...

NASA's Curiosity rover, coming together for a late 2011 launch to Mars, has a newly installed component: a key onboard X-ray instrument for helping the mission achieve its goals. More...

Many scientists speculate that our galaxy could be full of places like Pandora from the movie "Avatar" -- Earth-like worlds in solar systems besides our own. More...

On June 3rd, 2010, something hit Jupiter. A comet or asteroid descended from the black of space, struck the planet's cloudtops, and disintegrated, producing a flash of light so bright it was visible in backyard telescopes on Earth. More...

Rocks examined by NASA's Spirit Mars Rover hold evidence of a wet, non-acidic ancient environment that may have been favorable for life. Confirming this mineral clue took four years of analysis by several scientists. More...

Without warning, a mystery object struck Jupiter on July 19, 2009, leaving a dark bruise the size of the Pacific Ocean. More...

Going against the grain may turn out to be a powerful move for black holes. More...

Data from NASA's Mars Reconnaissance Orbiter have helped scientists solve a pair of mysteries dating back four decades and provided new information about climate change on the Red Planet. More...

Astronomers studying the Milky Way have discovered a large number of previously unknown regions where massive stars are being formed. More...

NASA's Mars Exploration Rover Project will pass a historic Martian longevity record on Thursday, May 20. More...

Astronomers are a bit like archeologists as they dig back through space and time searching for remnants of the early universe. In a recent deep excavation, courtesy of NASA's Spitzer Space Telescope, astronomers unearthed what may be the most distant, primitive cluster of galaxies ever found. More...

"The Star That Ate My Planet" may sound like a B-grade science fiction movie title, but this is really happening 600 light-years away. More...

The Herschel Space Observatory has uncovered a cosmic garden of budding stars, each expected to grow to 10 times the mass of our sun. More...

For the first time, scientists have detected clear signs of recent lava flows on the surface of Venus. More...

Hubble has snapped a spectacular view of the largest "player" in the Leo Triplet, a galaxy with an unusual anatomy. More...

Astronomers have their eyes on a hot group of young stars, watching their every move like the paparazzi. More...

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