We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

What’s really inside a black hole? Long considered one of the greatest cosmic mysteries, black holes were first predicted in 1916 through Einstein’s theory of relativity. Yet it wasn’t until the 1960s ...

NASA astronomers have confirmed what may be the greatest discovery of the era. They found a significant reservoir of water that was hidden in the cosmos, and that surrounds a quasa ...

Ten inmates escaped from a New Orleans jail almost two months ago, and authorities have captured all but the man with the most violent rap sheet.