Milky Way's fastest stars could be runaways from another galaxy
Hypervelocity stars might not come from black holes after all.
ESA throws its weight behind satellite-based 5G internet
The agency and its new partners are preparing to perform various tests in the next few years.
Doomed Mars lander wasn't equipped for supersonic conditions
Conditions during the Mars descent were more severe than anyone expected.
NASA seeks comet 'crumbs' with a new detection technique
LISA Pathfinder could map the trails of comet dust in the Solar System.
Watch the ESA trace 2 million stars' journey across the skies
Our descendants sure won't see the same constellations we do.
Lights out on a ghostly James Webb Space Telescope inspection
Newly discovered star remnants are the brightest ever seen
NGC 5907 X-1 is also the furthest pulsar ever observed.
Astronaut filmed elusive blue lightning aboard the ISS
And the video is quite mesmerizing.
Japan's space junk collection experiment ends in failure
The Kounotori 6 spacecraft burned up upon atmospheric reentry early Monday.