Worlds upon worlds await us in the cosmos and we’re finding more all the time. Before 1992, we weren’t even completely certain planets existed outside of our solar system. Now, astronomers are finding ...

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 ...

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

Scientists think we could be closer than ever to finding alien life on other planets – with a new simple method. This month, Manuel Scherf and Helmut Lammer of the Austrian Academy of Sciences ...