An asteroid the size of the Leaning Tower of Pisa has been spotted, just days before it makes a close pass by the planet.

Scientists have recently identified one of the most threatening asteroids ever discovered,99942 Apophis. Measuring about 370 ...

Even with many lawmakers in favor of maintaining NASA's budget, a flat budget is still a funding cut when accounting for ...

NASA experts explain why a passing asteroid isn't cause for concern, while revealing how often Earth encounters space rocks and preview what's coming in 2029.

The OSIRIS-REx spacecraft's name has been changed to OSIRIS-APEX for its new mission to asteroid Apophis. See its journey to ...