Astronaut Sunita Williams, 59, experienced significant weight loss during her 155-day stay on the International Space Station ...

NASA astronaut Sunita 'Suni' Williams, who is stranded in space until 2025, has spoken out after new photos onboard the ISS ...

University of Colorado Boulder alum Sarah Gillis returned to Boulder on Monday after a space mission where she participated ...

Juno also snapped pictures of Jupiter's potato-shaped inner moon, named Amalthea. With a radius of only 52 miles (84 ...

This claim was, in fact, true. McCandless was, indeed, the first astronaut to perform an untethered spacewalk on Feb. 7, 1984 ...

The three NASA astronauts who’d spent seven months living and working on the International Space Station would not disclose ...

Three NASA astronauts whose prolonged space station mission ended with a trip to the hospital last month declined to say ...

The astronauts remained tight-lipped about the nature of the medical issue that had left an as-yet-undisclosed crew member ...

NASA denies reports that astronaut Suni Williams' health could be declining after photos of her 'gaunt' appearance raise ...

NASA astronaut Sunita Williams, currently on the International Space Station, experiences 16 sunsets and sunrises every day.