Astronomers witnessed planets colliding 11,000 light-years away, an event that could shed light on the collision that created Earth's moon.

Six planets are set to align on Saturday, creating a planetary parade that will be visible to sky-gazers across the globe.

Stargazers will soon have an opportunity to view six planets in alignment in the night sky, according to NASA. Mercury, Venus, Neptune, Saturn, Uranus and Jupiter will take part in a rare planetary ...

The planets will align in the night sky on Feb. 28. Here is when to look up and which ones are visible without a telescope.

Finding Earth-like planets orbiting sun-like stars and identifying signs of life such as oxygen or water is a major goal in ...

Could a recently discovered "super-Earth" have the potential temperature and conditions to sustain life? The new exoplanet is situated "fairly close to us" -- only 137 light-years away -- and orbits ...

NASA’s Planetary Defense Coordination Office sounds like something out of a disaster movie, but its work is far more methodical than cinematic. Instead of scrambling at the last minute, the office ...

Jupiter, the largest planet in the solar system, may have been responsible for a mysterious age gap in the early solar system's planet building blocks. Credit: NASA / JPL-Caltech / SwRI / ...