A mysterious object from another star system is racing through our Solar System, and every major space telescope is watching.

This video breaks down why K2-18b has suddenly become one of the most important planets in the search for life beyond Earth.

For your extraterrestrial viewing needs, Stacker ranked the top 30 alien movies, according to their IMDb user rating.

Could humans spread Earth life beyond our planet? Astrobiologists explain where extremophiles might survive and why the risks ...

Avi Loeb vows to brief public and create website to share findings of team tasked with investigating origins of mysterious ...

NASA's Perseverance rover has uncovered one of the most intriguing clues yet in humanity's search for life beyond Earth.

The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more ...

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

An interstellar comet that passed through the Solar System last year may be up to 12 billion years old – far older than the ...

Based on evidence collected by the James Webb Space Telescope, researchers have found that interstellar comet 3I/ATLAS could ...

A Stanford scientist's model suggests many small rocky planets can't sustain atmospheres, potentially explaining the scarcity ...

Scientists propose building a lab on the moon to screen Mars and other space samples for alien microbes before they ever ...