What caused this huge asteroid to disappear mysteriously?

200,000-ton asteroids don't usually just disappear into space (okay, maybe sometimes do), but when astronomers at NASA trained the Hubble on this asteroid, they were puzzled to see it was falling apart right before their eyes, the first time they'd ever seen such a sight. » 3/06/14 6:00pm 3/06/14 6:00pm

This pulsar got slammed by a billion-ton asteroid

You know when you're having a bad day when you get hit by a billion-ton asteroid. But for a pulsar 37,000 light-years away, it's just a another day at the office. And besides, PSR J0738-4042 has an uber-powerful X-ray blaster to deal with errant space rocks. » 2/21/14 7:20am 2/21/14 7:20am

Ask an astrophysicist anything you want about nearby asteroids!

Amy Mainzer is an astrophysicist at the Jet Propulsion Lab who builds instruments for space telescopes that allow us to study Earth's nearest neighbors, including asteroids, comets, and stars. She's here today to answer your questions about all the objects whizzing past Earth — and which ones we should be keeping our… » 11/21/13 9:30am 11/21/13 9:30am

The UN adopts official guidelines for protecting Earth from asteroids

The United Nations has approved a set of measures to protect our planet from the dangers of incoming asteroids. The recently-adopted guidelines will correct a number of outstanding issues, including global coordination and an actual response plan. » 10/28/13 1:20pm 10/28/13 1:20pm

Astronomers discover a massive asteroid that could hit us in 2032

Mark August 26th, 2032 on your calendar, folks. Ukrainian astronomers have just detected a 1,350-foot-wide (410 meter) minor planet that’s headed our way. The impact risk is minimal, but it’s now the most serious near-term celestial threat to face our planet. » 10/17/13 9:00am 10/17/13 9:00am

Astronomers Find Water on the Remnants of a Destroyed Planet

For the first time ever, scientists have found actual chemical evidence of water on a rocky object outside of our solar system. The water wasn’t found on a planet, but rather the remains of one shredded to bits by its dying parent star. » 10/11/13 8:00am 10/11/13 8:00am