If another gravity theory is correct, "then the broader implications are enormous," astrophysicist Stacy McGaugh told ...

Sixteenth century Danish astronomer Tycho Brahe laid the framework for modern cosmology without ever using a telescope.

The Hubble Space Telescope has captured imagery of the most distant single star found yet. It took the light from the star 12 ...

A 60-year-old tribute to America's first human spaceflight program is standing up to the test of time, but what about the ...