Even at a glance, the planets in our solar system are wildly diverse. Huge and small, airless and densely packed with ...

A single alien world can be misleading. A strange gas in an atmosphere might look promising, then turn out to come from ...

Aristotle's views on the nature of the cosmos dominated the Ancient Greek world. He argued that there's only one world, at ...

Usually, comets are dormant blocks of rock and ice. They only wake up when they get close to a star. The intense heat causes ...

The Apophis asteroid, once feared to hit Earth, is less than three years from making an unprecedented approach toward Earth.

Two Earth-sized planets orbiting TRAPPIST-1 are locked in permanent day and night, with heat differences suggesting they are ...

A research team has developed a new approach to detecting life beyond Earth that does not rely on identifying specific ...

A new study proposes detecting life in space by spotting patterns across many planets instead of focusing on one at a time.

From lava tubes on Mars to ice pockets on Europa, subterranean environments may offer the best chance of finding life—and living safely—beyond our planet. “I was like, ‘OK, I'm pretty sure that ...

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.

These findings suggest that the absence of past detections does not mean discovery is imminent. If extraterrestrial technologies exist and have already sent signals that reached Earth, they are likely ...

Proxima b the closest known exoplanet to Earth has sparked new interest in the search for life beyond our solar system Its proximity makes it a key target for future exploration despite the immense te ...