A newly-discovered star, and possibly habitable planet, are strikingly familiar to humans

Scientists discovered an Earth-like, potentially habitable planet about 3,000 light-years...

A second planet might orbit the closest star to the sun, and astronomers think it's a super-Earth

Astronomers think the planet, called Proxima c, is a super-Earth that formed far from the...

NASA has confirmed a new class of huge 'super-puff' planets that have the density of cotton candy

Because their hydrogen-helium atmospheres balloon out, these planets are nearly as big as...

A new space telescope is about to take an unprecedented look at alien planets circling distant stars. Watch it launch live.

CHEOPS will attempt to study the atmospheres of exoplanets. It launches into Earth orbit...

A handful of new telescopes are about to transform the hunt for alien life and our understanding of the universe itself

NASA and other space agencies are building telescopes that will study dark matter,...

A winner of this year's Nobel prize in physics is convinced we'll detect alien life in 100 years. Here are 13 reasons why we haven't made contact yet.

A Nobel prize-winner thinks we'll detect aliens within 100 years, possibly sooner. Other...

Scientists have discovered a new planet twice the size of Earth, and it could have liquid water on its surface

Scientists have discovered a new planet that's 226 light-years away. It is roughly twice...

Astronomers found a 'cold super-Earth' less than 6 light-years away — and it may be the first rocky planet we'll photograph beyond the solar system

And there are even hints that a second world may lurk nearby.