Earth thought she was the best—until she discovered a rival. In another world, things are very different. Welcome to SpaceBalls, where planets debate, collide, and reveal cosmic secrets! Watch as ...

A distant gas giant the size of 10 Jupiters is now the first planet outside Earth's solar system to be mapped in three ...

Out of thousands of planets strewn across the universe, Earth got pretty lucky. It has a close, but not too close, sun. It has a protective atmosphere. It has water and oxygen and a variety of ...

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth than the hypothetical Planet X, which astronomers have been hunting for ...

Earth' orbiting within its star's habitable zone, just 20 light-years from Earth, could host extraterrestrial life.

Exoplanets are planets outside Earth's solar system. In 1995, a gas giant named 51 Pegasi b, which orbits a star similar to Earth's sun, etched its name in history as the first exoplanet ever ...

An international team of researchers has just revealed the existence of three Earth-sized planets in the binary stellar ...