The megarocket's latest test flight went well, but SpaceX still needs to overcome a critical engineering hurdle.

Scientists confirmed that the crater dates back around 390 million years ago.

The heat could be rising from cooling lava flows beneath a layer of solidified crust.

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.