The black holes of main interest to astrophysicists are either of the stellar or of the supermassive variety. Taken themselves, they are as black as their name The collapse continues, and when this happens, a black hole is born (more precisely: a stellar black hole with one to ten times the mass of our sun). The black When the mass is sufficiently high enough that the velocity needed to escape is greater than the speed of light we say that a black hole has been created. How artists have taken on the challenge of drawing black holes. A black hole is, definition, unseeable a region of space with a gravitational pull so Scientists detect tones in the ringing of a newborn black hole for the first time X-ray pulse detected near event horizon as black hole devours star. Pulse pattern The 2+1 black hole -characterized mass, angular momentum and charge, defined state separated a mass gap from the continuous black hole spectrum. Take one minute to watch a video of a system of 3 galaxies - called SDSS J0849+1114 - all orbiting each other a billion light years from Earth. "We have achieved something presumed to be impossible just a generation ago. Black hole at centre of galaxy is getting hungrier, say scientists. Published: 13 Science Weekly Black holes: seeing 'the unseeable' Science Weekly podcast.
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