New photos and videos of the sun's surface show cells of boiling plasma that are half the size of SA

Such images could help forecast dangerous space weather.

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...

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,...

Scientists detected the brightest light in the universe for the first time, following a mysterious explosion in space

Astronomers had 50 seconds to turn their telescopes toward a violent explosion in a...

The universe is expanding faster than scientists thought, a study confirms — a 'crisis in cosmology' that could require a 'new physics'

NASA's Hubble Space Telescope and new mirror technology confirmed a mystery that could...

NASA's Hubble space telescope just took incredible photos of a visiting comet from another star system

NASA also released a time-lapse video of the comet, 2I/Borisov, hurtling past the sun....

Satellite collisions may set off a space-junk disaster that could end human access to space. Here's how.

Experts worry that debris orbiting Earth could lead to a "Kessler syndrome" domino effect...