News Stories relating to "asteroids"

It's not just the big asteroids we have to watch out for?the little rocks can be dangerous too. They're hundreds of them out there and they're hard to spot, but NASA has decided it had better start searching for them.

Robert Roy Britt writes in Space.com that it will cost at least $236 million to add a search for small asteroids to their...

During the 1948-1952 UFO flap, green fireballs kept appearing over the western U.S. These were officially classified as meteors, and appeared in the same general area of the country as the green fireball that was seen last weekend in the West. Many UFO investigators have speculated about a possible connection between the green fireballs and the...

An asteroid may have wiped out the dinosaurs 65 million years ago, but an earlier one probably allowed the rise of the giant creatures, who dominated the planet for 135 million years. After their demise, mammals took over and eventually evolved into humans, so our domination was caused by an asteroid as well. Will asteroids also bring about the...

When Earth is next hit by an asteroid, the impact may well be doubled, since a new study estimates that 16 percent of asteroids in the region of space shared by Earth's orbit are actually double asteroids, called binaries. Evidence shows that impacts on Earth sometimes involve a pair of craters. Researchers say these pairs may have been created...

NASA's Near-Earth Asteroid Tracking System has detected five more near-earth asteroids in the past few days, after a near-miss was recorded over Christmas. While the number of large near-earth asteroids is believed to be between 500 and a thousand, not the 2000 previously estimated, it appears that the overall number of objects may be much...