Ukrainian scientists have discovered a massive asteroid; NASA responds. This diagram shows the orbit of asteroid 2013 TV135 (in blue), which has just a one-in-63,000 chance of impacting Earth. Its ...

WASHINGTON - Upon further review, a big, scary-sounding asteroid is no longer even a remote threat to smash into Earth in about 20 years, NASA says. Astronomers got a much better look at the asteroid ...

In 2036, an asteroid bigger than two football fields will pass within 23,000 miles of the Earth. For some reason, Russian astronomers seem convinced that this asteroid will strike the planet and cause ...

PHILADELPHIA -- An asteroid named for the Egyptian god of chaos and darkness won't be wreaking any havoc on Earth -- at least not this century. That's the good news from NASA's Center for Near-Earth ...