Scientists have more thoughts on 'Oumuamua.
Conventional wisdom has it that aliens should be either everywhere, or nowhere. A new model suggests they can be both.
Virgo will help LIGO locate colossal cosmic collisions.
Naming new worlds is a confusing mess
Amazon, NVIDIA, and others on board to automatically map the world
The first Facebook Live interview from space starts at 12:55 PM ET
Made with sulfur, the material could build smelly but sturdy structures on the red planet
Antarctic particle detector's findings validated
So at least we'll see them coming
Astronaut Leroy Chiao explains what it will take for commercial passengers to fly into space
Flying crawling space robots. Cool, not nightmares.
HoloLens already used in weightless simulation free-fall flights
No more drinking "fresh" java from a plastic pouch
Why is NASA's longest-serving woman an hourly employee?
An excerpt from Spaceman, a memoir by astronaut Mike Massimino
Excerpt: Chasing Space
My, what epic epochs you have there
And what does it have to do with my GPS being wonky?
Excerpt: A Book of the Moon
The latest and greatest images from the New Horizons mission
A linguist looks into the missing 'a.'