An unusual x-ray signal from the Helix Nebula, first detected in 19180, could stem from a star destroying a nearby planet.

A small international team of astronomers has confirmed that a binary star system with an odd signal has a companion—a planet roughly twice the size of Jupiter, which may have emerged from a ...

There's never a dull moment — er, light year — in outer space. NASA's Chandra X-ray Observatory and the European Space Agency's XMM-Newton spotted an unusual X-ray signal in the data received from the ...

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Now, two astrophysicists at the University of Miami say this strange signal, named S251112cm, could be the first real evidence for primordial black holes, objects believed to have formed within a tiny ...