The dividing line between the inside and outside of a black hole is called the event horizon. Anything crossing the horizon—a star ... in New York City. Around the same time there was a radical ...

A distant galaxy that lay quiet for decades has suddenly stirred, lighting up in dramatic bursts that have caught astronomers ...

Surprisingly, the spectra captured by the Gran Telescopio Canarias at this time revealed that all the hydrogen line ... of a star that comes too close to the intermediate-mass black hole reveals ...

Stars are the architects of nearly all ... stretched and amplified by turbulent motions of gas swirling around the behemoth black hole at the center of our galaxy, Sagittarius A*.