For a few months, Earth had a second moon — a tiny asteroid that may have been a piece of our own Moon ...

For a brief, but exciting, time last year, Earth had two moons. A small asteroid lingered close to our planet in its orbit ...

In the United States, funding for planetary defense has long had strong bipartisan support both inside and outside of ...

The case of mistaken identity was quickly resolved, but astronomers say it shows the need for transparency around craft in ...

Typically, asteroids - like the one depicted in this artist's concept - originate from the main asteroid belt between the ...

Mars is home to perhaps the greatest mystery of the solar system: the so-called Martian dichotomy, which has baffled ...

DULUTH — The old Sears Diehard TV commercials always intrigued me as a kid. A snow-encased car would stand sentry on top of a ...

With a friend in the White House, the tech billionaire's extraterrestrial ambitions are ready for lift-off - but not ...

Scientists think a small rock discovered near Earth last August was hurled into space by an ancient impact on the lunar surface.

The asteroid is estimated to be between 656 and 1,443 feet across, and will pass at 16 times the distance to the moon.