An animation posted to Twitter has shocked social media users by showing the impressive size of Jupiter and just how rapidly the solar system's largest planet rotates. The animation posted by ...

Astronomers studying extreme planetary systems have identified worlds so massive that they rival the smallest stars in size.

During its 4.5-billion-year life span, Earth’s been hit by countless asteroids. (Despite Jupiter’s noble attempts at defending it.) But while it’s easy to imagine the damage they’ve done, just how big ...

FLORIDA: Astronomers have found a nearby solar system with seven Earth-sized planets, three of which circle their parent star at the right distance for liquid surface water, bolstering the prospect of ...

WASHINGTON (Reuters) - NASA's Kepler mission has discovered the first Earth-size planets orbiting a sun-like star outside our solar system, a milestone in the search for planets like the earth, the ...