Asteroids
Spitzer Sees an Alien Asteroid Belt
NASA's Spitzer Space Telescope has discovered an enormous asteroid belt orbiting another star, containing 25 times as much material as…
Torino Scale Revised
Astronomers searching for potentially destructive Earth-crossing asteroids have revised the scale they use to communicate the risk of impact to…
Asteroid Created a Rain of Rock
When a 10-km (6-mile), dinosaur-killing asteroid struck the Earth 65 million years ago, it released so much energy that it…
New Theory on Meteor Crater
Scientists are in agreement that a rock from space smashed into the ground in Arizona 50,000 years ago, carving out…
Dawn Will Show How Different Two Asteroids Can Be
It's called Dawn, and in a little more than a year, this spacecraft will blast off from Florida, bound for…
Dr. David J. Tholen Answers Your Asteroid Questions
A few days ago we asked you to send in your Near-Earth asteroid questions for Dr. David J. Tholen from…
Asteroid Threat Ruled Out
Astronomers have now ruled out the possibility that Asteroid 2004 MN4 will strike the Earth in April 2029. Scientists from…
Asteroid Threat Upgraded to 1 in 45
The probability that Asteroid 2004 MN4 will strike the Earth on April 13, 2029 has actually been upgraded to a…
Asteroid 2004 MN4 Gets the Highest Score on the Torino Scale
A newly discovered 400-metre (1,300 ft) asteroid has been given a 2 on the Torino asteroid impact scale; the first…
Why Eros Has So Few Craters
When the NEAR spacecraft approached the Asteroid Eros in 2000/2001, scientists found much less small impact craters than they were…