NASA astronaut Nichole Ayers photographed a rare atmospheric phenomenon over the US and Mexico known as a "sprite" that's associated with lightning.

NASA astronauts on ISS capture images of lightning from space The images McClain and Ayers shared show electrostatic discharges – in other words, lightning – from above the clouds as they ...

Two NASA astronauts steppes outside the International Space Station on Thursday to take part in U.S. Spacewalk 93, NASA's fifth-ever all-female spacewalk.

How NASA’s waylaid astronauts finally got home By Jackie ... a supernova explosion of a star known as SN 2014J in the galaxy M82 appears in a Hubble Space Telescope composite image. NASA ...

In a remarkable coincidence, NASA astronaut Don Pettit will mark his 70th birthday with a fiery reentry through Earth's atmosphere on Saturday, capping off his fourth mission to space, the agency ...