Studying the atmospheres of white dwarfs that have been “polluted” by such debris, researchers have identified exotic rock types.

If the known laws of physics hold, then a galaxy-spanning human civilization is impossible. Unless of course you can build a warp drive.

Astronomers have reported the discovery of a structure thought to be a "protocluster" of galaxies 11 billion light-years from Earth.

A planet transiting a star outside of the Milky Way galaxy may have been detected for the first time by the Chandra X-ray Observatory.

While black holes and toddlers don't seem to have much in common, they are remarkably similar in one aspect: Both are messy eaters.

Astronomers have succeeded for the first time in quantifying the proton and electron components of cosmic rays in a supernova remnant.

In the vicinity of black holes, space is so warped that even light rays may curve around them several times.