A new study finds that Earth once had Saturn-like rings. The temporary structure likely consisted of debris from a broken-up asteroid.

The coming week will see the gas giant Saturn return to the Northern Hemisphere's late night sky, after spending the last few ...

Our universe just got a lot weirder. From planets with rings larger than the Sun to alien worlds where it rains molten iron or glows magenta, NASA’s latest exoplanet discoveries are challenging ...