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Searching for an ET? Scientists Say Look for Signs of Aliens Mining Asteroids

After 50 years of searching the heavens with radio telescopes to try to contact alien life, so far the attempts of SETI (Search for Extraterrestrial Intelligence) scientists seem to have fallen on deaf ears. So is there another way to try to find aliens in our galactic neighborhood? Some scientists suggest looking for...

White House Adviser: US Must Prepare for Asteroid

(Oct. 25) -- If an asteroid were on a collision course with Earth, would we be ready to defend against its destructive impact or would we be helpless and defenseless? NASA, America's space agency, is being charged with leading the way to protect not only the U.S. but the entire world in the event of such a horrifying...

Scientists Witness Trail of Asteroid Collision

(Oct. 13) -- For the first time ever, scientists have front-row seats to one of the solar system's great demolition derbies. Stargazers have long known that asteroids slam into each other every now and then, but they've never been lucky enough to witness the result of a collision as it unfolds -- until now. Pictures...

'Potentially Hazardous' Asteroid Discovered

(Sept. 28) -- A high-tech asteroid-hunting telescope in Hawaii has discovered a "potentially hazardous" space rock that's expected to hurtle within 4 million miles of Earth next month. The asteroid, which scientists have named "2010 ST3," is about 150 feet wide and is expected to breeze past the planet sometime in...

Close Encounters: Is the Sky Falling ... Again?

(Sept. 8) -- This evening, a visitor from outer space will pass a hair's breadth from Earth. A space rock known as 2010 RF12 will whisk so close that even though it is too small to do any damage if it hit the planet, it will be visible for roughly an hour through a hobbyist's telescope. JPL / NASA Asteroids 2010 RX30 and...

Background on asteroids

Asteroids (from Greek ἀστεροειδής - asteroeidēs, "star-like", from "star" and "like, in form") are a class of small Solar System bodies in orbit around the Sun.

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