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

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 ...