Far beyond the eight familiar planets in our solar system, countless bizarre and extreme worlds await discovery — and some have already been found. Thanks to rapidly advancing telescope technology, ...

Humans should look to planetary alignments outside of the solar system when searching for signatures of extraterrestrial communications, scientists say. The nascent search for radio transmissions from ...

Astronomers discovered the TRAPPIST-1 system, a family of tightly packed planets swarming a red dwarf star, about eight years ago. Credit: Mark Garlick / Science Photo Library / Getty Images ...

A new Alien: Earth teaser has set up the alien invasion of earth the show revolves around. The brief clip, below, shows events from the point of view of an alien as it races through the interior of a ...

The latest hunt for alien signals in the TRAPPIST-1 planetary system has test-driven a new strategy that will allow astronomers to perform a more efficient, targeted search for technological ...

Recent observations suggest that scientists have identified potential microbial fingerprints in the atmospheres of other planets, raising intriguing questions about the possibility of alien life ...

Life may not get blasted off any of the known "super-Earth" worlds as readily as it can from our planet, scientists find. The discovery suggests that any intelligent aliens that develop on such ...

A team of astronomers claims to have sniffed out a “biosignature” in the atmosphere of a distant planet called K2-18b. But not everyone agrees that it signals life. An illustration shows what ...