One of them is about 4.2 light years away - more than a whopping 24 trillion miles from Earth! Find out more here.

This artistic illustration shows the TRAPPIST-1 red dwarf star system, home to seven Earth-sized exoplanets, several of which lie within the star’s habitable zone. In the foreground is TRAPPIST-1 b, ...

NASA officials have previously spoken of the possibility of extraterrestrial life amid scientific uncertainty while ...

Alien planets are far away but extreme lasers on Earth are giving scientists a way to investigate what they're like.

Humans have wondered for centuries whether we are alone in the universe — and a new study suggests that if alien ...

'Do all aliens really need sunlight?' ...

NASA has taken a bold step in the search for alien life beyond Earth. The space agency announced the selection of seven advanced technology partners for its next major mission, the Habitable Worlds ...

Add Yahoo as a preferred source to see more of our stories on Google. A composite view of Mars taken by the Viking I and II probes. NASA/USGS In September, NASA announced the discovery of a possible ...

Like the lead character of “Project Hail Mary,” some scientists are proposing ways that life might exist beyond a star’s “habitable zone,” often considered the gold standard of potential livability An ...

The ExoLife Finder (ELF) looks like no telescope ever built. A spectacular crown of 15 five-meter mirrors perches atop a ...

Scientists have uncovered a surprising way to study the harsh space weather around young M dwarf stars. Mysterious dips in starlight turned out to be massive rings of plasma swirling in the stars’ ...