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What happens to the mass when a black hole moves?

  1. Feb 24, 2016 #1
    I've recently read a new article that said that the recent gravitational waves might have had 2 black holes in a star

    that gave me a question, because you need masses to move or accelerate to generate gravitational waves, what happens to the mass inside of the star? because black holes's space time have no way out, would it consume the mass of the star leaving space? (but that would mean it'd skew the pressure of the star)

    or does most mass just bend around the blackhole and never goes into the blackhole itself? because according to schwarzschild radius formula, everything has mass would have a black hole, but what if we skewed the mass? say, displace a lot of iron on earth to one side, that would move the blackhole itself, does that mean it's create a cavity?
  2. jcsd
  3. Feb 24, 2016 #2


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    Just as any other particle, black hole has two kinds of energy. Intrinsic energy of the system at rest (also called mass), and kinetic energy of motion. Only the latter energy is lost when a system of two black holes (spiraling around each other) produces gravitational waves.
  4. Feb 24, 2016 #3


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    You misunderstand the Schwarzschild radius. It is a black hole only if all the mass is inside the radius. For the sun (and other stuff) the S. radius is a lot smaller than the actual radius of the sun.
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