Researchers are zeroing in on more deliberate “narrow-band” alien signals, well outside the radio frequencies SETI has focused on for decades.

This is SpaceX's second go at Flight 13 after the mission was scrubbed at the last minute on July 16.

A Falcon 9 upper stage is on a collision course with the Moon. Researchers hope to turn this spectacle into a scientific opportunity.

Two mysteries come together to address a decades-long puzzle.

Ludi Tance 4-01 is powered by gallium nitride semiconductors, enabling constant surveillance over one-third of the Earth’s surface.

Astronomers discovered a moon-like object orbiting a brown dwarf that's orbiting a star. Say that three times fast.

The planned planetary defense test would hit harder than NASA's DART mission.

The solar cycle can be irregular, but some patterns might be trackable—enough to provide a heads-up before extreme weather events.

The Jellyfish Nebula, one of the best-studied supernova remnants in our galaxy, may have been hiding a sibling this whole time.

The asteroid 1998 SH2 is actually not an asteroid at all.

Researchers identified the Chicxulub impactor as an exceptionally rare type of asteroid that wouldn't have triggered a mass extinction in the way scientists previously thought.

For decades, astronomers puzzled over the Sun’s missing silver. Turns out, we just weren’t looking at it in the right way.

New research led by NASA Goddard found persistent “erroneous measurements” skewing past estimates for how severe geomagnetic storms can get.