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

From magnification to light-gathering, here’s how to make the decision between buying a telescope or a monocular for ...

A rare breed of star recently discovered by the Hubble Space Telescope spins faster by feeding on its stellar siblings.

Suni Williams steps outside the International Space Station for the first time since arriving in June on Boeing’s Starliner.