A galaxy inside a bubble may be evidence that the universe was starting to become transparent 330 million years after the big bang ...

NASA calls this kind of celestial occurrence a "fireball event" Getty Residents of Mexico City are pondering the out-of-nowhere blinding light in the ... a story — sign up for PEOPLE's free ...

"With only lunar soil and a basic ingredient from the sun — which is always spitting out hydrogen — there's a possibility of ...