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Hidden Black Holes Discovered

mknewman wrote to mention a Space.com article discussing the discovery of a large group of hidden black holes. From the article:"Black holes cannot be seen directly, because they trap light and anything else that gets too close. But astronomers infer their presence by noting the behavior of material nearby: gas is superheated and accelerated to a significant fraction of light-speed just before it is consumed. The activity releases X-rays that escape the black hole's clutches and reveal its presence. "

3 of 224 comments (clear)

  1. Re:Timely articles by Anonymous Coward · · Score: 1, Insightful

    Hook line and sinker. If you don't like trolls you should stop feeding their ego by replying to them.

  2. Re:Geek explanation required. by sillybilly · · Score: 2, Insightful

    Why is it that an electron orbiting the hydrogen atom doesn't accelerate? Acceleration into a different dimension - i.e. perpendicularly - is still acceleration, and normal electrons going circularly in a cyclotron do radiate. Yeah, it would mean an energy catastrophe, sooner or later it would have to give up juice, either potential or kinetic energy, and run out of it. So these day we just say - postulate - that it goes in circles but it's forbidden to accelerate thus radiate, but could we say "it doesn't go in circles", or more precisely, it doesn't accelerate at all? It doesn't shift dimensions?

  3. Minor nitpick by techno-vampire · · Score: 2, Insightful
    ...the diameter of a Black Hole is a direct function of the mass of the Black Hole (which includes the mass and effective mass of everything it consumes).

    If you want to be accurate, the circumference is a direct function of the mass; the diamater may well be infinite.

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