Boeing's Starliner capsule has been cleared for its first-ever crewed launch, a test flight scheduled to send two astronauts toward the International Space Station on May 6.
Veteran NASA astronauts Butch Wilmore and Suni Williams expect to face the unexpected in space with Boeing Starliner, but told reporters on April 25 that the team is ready for the unexpected.
As a planetary scientist and astrobiologist who studies ice grains from Enceladus, I'm interested in whether there is life on this or other icy moons. I also want to understand how scientists like me could detect it.
Take a look at the very best space photos submitted by Space.com readers, from our moon to deep space and everything in between!
A preview of Marvel Comics' "Aliens vs. Avengers" limited series, which is coming this summer.
Castor, the second-brightest star in the constellation Gemini, is one of the most luminous stars over Earth and a key target for skywatchers, showing there is often much more to stars than meets the eye.
