The difference between an asteroid and a comet was always thought fixed—but now a new paper says the two celestial bodies …
asteroid
NASA Finds New Asteroid Headed in Our Direction
Though it won’t come near Earth for at least a century
First Ever Asteroid With Six Tails ‘Belches’ Space Dust
Astronomers spot the bizarre rock with NASA’s Hubble telescope
NASA’s Proposed Asteroid Capture Mission Animation
The best two things you can say about this video NASA just posted of its proposed asteroid capture mission is that it’s insanely cool to watch and it will cost you only 4 minutes and 42 seconds of your life. The worst you can say is that it will cost taxpayers billions of dollars in development costs before it is ultimately discarded as …
Second Gunman in Death of the Dinosaurs
A cunning study of geology, shells and ancient magnetism offers clues to a long-ago extinction