Sunita Williams said two things left a lasting impression on her during her years in space. The astronaut pointed to the ...

Sunita Williams, retired astronaut, reveals surprising sights from space, including numerous satellites and rare lightning ...

The Hubble Space Telescope has been a major contributor to space exploration ever since it was delivered into low Earth orbit on April 24, 1990, by NASA's Space Shuttle Discovery. The telescope is a ...

The International Space Station (ISS) is one of the most unique environments where life has ever existed, out in the low orbit of Earth. And research out today finds that bacteriophages—the viruses ...