Ready or not, sex in space will be happening within the decade.

While a return to the Moon will allow the U.S. to collaborate with other nations interested in space, this endeavor is also complicated by geopolitical tensions.

While UFO videos might seem compelling, they’re rarely backed up with evidence. A sociologist explains why claims of alien life gain traction through both social and mass media every few years.

"...a new type of star is pretty interesting all by itself, but discovering it's dark matter that's powering this—that would be huge."

Space telescopes are limited in size due to the difficulties and cost of getting into orbit. By revamping an old optical technology, researchers are working on a lightweight and thin telescope design.

A study of magnetic fields suggests the Red Planet held water for longer than previously believed.

A new technique uses remote images to gauge the strength of ancient and active rivers beyond Earth.

A strand of lined-up galaxies in the early universe reveals clues—and questions—about the fundamental architecture of the universe.

With two eclipses and several meteor showers coming up, an astronomy professor shares travel tips for viewing astronomical phenomena.

A European mission to explore how gravity, dark energy and dark matter shaped the evolution of the Universe soared into space today from Cape Canaveral.