Saturn’s rings, imaged here by NASA’s Cassini orbiter, are one of the solar system’s most reliably spectacular sights. But ...

The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting ...

NASA astronaut Suni Williams is seen outside the International Space Station during the Jan. 16, 2025, spacewalk where she ...

View the planets and night skies from home - Heavens above! Your guide to the best telescopes for stargazing, created for all ...

Giant ground-based reflector telescopes do much of astronomy's heavy lifting, although the U.S.'s largest in Hawaii is not ...

Sunita Williams, one of the two NASA astronauts stranded on the ISS, completed her first spacewalk since arriving onboard ...

A little-known chapter of the Hubble Space Telescope’s history is a reminder of the risks of looking at the sun ...

Nasa astronaut Suni Williams, one of two astronauts stuck on the International Space Station, has completed her first ...

Astronauts Suni Williams and Nick Hague completed pivotal maintenance tasks on the International Space Station in their ...

NASA astronauts Sunita Williams and Nick Hague embark on a crucial spacewalk outside the ISS, marking Williams' eighth ...

NASA astronaut Sunita Williams has successfully completed her eighth spacewalk, bringing her total extravehicular activity ...