New evidence shows that, far beyond Pluto, there may exist a hypothetical planet referred to as Planet X or Planet Nine.

Own your power, protect your family, and leave a cleaner planet behind. The best time to go solar is now: get in the queue to ...

Of the seven Earth-sized planets circling the red dwarf star TRAPPIST-1, one world has become a special focus for astronomers. This planet ...

This weekend's night sky will feature one of the best meteor showers of the year on Dec. 13-14. The Geminid meteor shower ...

TRAPPIST-1e, an Earth-sized world in the system’s habitable zone, is drawing scientific attention as researchers hunt for ...

The dream of colonizing other planets is a science fiction fantasy. This video presents a harsh, scientific reality check on ...