Some 22,500 miles above Earth, a spacecraft filled with thruster fuel will gas up two orbiting Space Force assets.

Private companies have launched nearly 120 civilians to the edge of space, establishing a new frontier in travel. Space tourism is no longer science fiction, but science fact.

NASA's James Webb Telescope has been investigating the first-ever case of a star caught swallowing a planet —and, in classic crime thriller style, there has been a plot twist.

Astronomer Charles Steinhardt said most stars we see "might have formed under different conditions than we previously believed." ...