This Ancient Asteroid Strike Was More Insane Than We Realized

Around 3.26 billion years ago — long before the dinosaurs — a massive asteroid measuring nearly 36 miles (58 km) across smashed into the Earth. Geologists have now reconstructed this cataclysmic event, and it was far, far bigger than we thought. Here's how things went down on that fateful day. » 4/10/14 12:00pm 4/10/14 12:00pm

What's the difference between a comet, asteroid, meteor, meteoroid and…

With all the recent buzz over asteroid AD14, the meteor over Chelyabinsk, the fragments of meteorite recovered in Russia's Ural mountains, and yesterday's news that the fireball originated from our solar system's asteroid belt, one can't help but wonder: what's the difference between all these -oids, -ors and -ites?… » 2/27/13 12:40pm 2/27/13 12:40pm

Watch Asteroid 2012 DA14's close encounter with Earth — live on io9!

Now that everyone's nerves are on edge following the break up of a small asteroid over Chelyabinsk, Russia this morning, we now turn our frayed attention to Asteroid 2012 DA14. NASA is scheduled to start its audio commentary at 11:00 AM PST (2:00 PM EST). The live broadcast will integrate real-time animation to show… » 2/15/13 10:38am 2/15/13 10:38am

NASA captures ominous video of the three-mile-long asteroid that buzzed…

On December 12, the three-mile-long (4.8 km) asteroid Toutatis came within 4.3 million miles (6.9 million km) of Earth — which is about 18 lunar distances. During the flyby, NASA used its 230-foot-wide (70-meter) Deep Space Network antenna at Goldstone, California, to generate a series of radar data images — which… » 12/17/12 6:30am 12/17/12 6:30am

Fewer asteroids are menacing Earth than we thought — and we know where…

NASA recently repurposed a satellite called WISE that had completed its mission with all instruments intact and quite a bit of fuel. Renaming the mission NEOWISE, the space agency gave the satellite a new job: map the entire volume of space in the vicinity of Earth's orbit around the sun, looking for every possible… » 9/30/11 10:20am 9/30/11 10:20am

We Saw This Asteroid Coming from a Mile Away

Click to view » 10/12/08 4:00pm 10/12/08 4:00pmWith all the hullabaloo about , we tend to forget the little guy. Luckily, NASA's Catalina Sky Survey has it covered. Last Monday, CSS astronomers caught sight of an incoming object zooming toward the Earth, and by the time of the asteroid's impact on Tuesday, NASA engineers had mapped out its trajectory…