A four-member crew, including NASA astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore, left the ISS early Tuesday on ...

Soviet Russia's Soyuz 11 cosmonauts Georgi Dobrovolski, Vladislav Volkov, and Viktor Patsayev died on their return to Earth ...

Skywatchers snapped photos of the "blood moon" hovering above North and South America last night. Here's a gallery of images ...

The blood moon occurs during a total lunar eclipse, according to NASA, when Earth lines up between the moon and the sun, ...