Watch how the Space Launch System rocket RS-25 undergoes a core stage engine test-fire. Credit: NASA's Stennis Space Center ...

Christmas is here, and so are brand new images of some of the most beautiful holiday-inspired celestial views in the visible ...

The “Christmas Tree Cluster,” or NGC 2264, is an array of young stars — all between 1 and 5 million years old — that is about ...

NASACrew members aboard the International Space Station celebrate the holiday season in a unique way while living and working at the orbitin ...

NASA astronauts Suni Williams, Nick Hague, Butch Wilmore, and Don Pettit recorded a Christmas message from the International Space Station.

NASA is getting into the festive spirit, sharing some stunning images of the Christmas Tree Cluster and the Cosmic Wreath.

While Santa begins approaching homes all over the world Christmas Eve; NASA will be making history as its solar probe gets to ...

NASA astronauts sent a “Merry Christmas” message to Earth from the International Space Station. Suni Williams and Butch ...

Suni Williams and Butch Wilmore won't be back on Earth before March, but they've got candy canes and Santa hats to celebrate ...

NASA’s Parker Solar Probe made a historic attempt to circle the sun at 6:53 a.m. EST on Tuesday, Christmas Eve, which, if ...

When the astronauts stranded at the International Space Station were pictured wearing Santa hats next to a tiny Christmas ...

Stunning star formations were captured during the holiday season by NASA's Chandra X-ray Observatory and the James Webb Space ...