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Planet and singularity

  1. Jul 30, 2003 #1
    Why does physicist only talk about gravity collpase on stars?

    Doesn't gravity collapse happen to planets? I mean they do not have any process such as nuclear fusion do repell gravity.
     
  2. jcsd
  3. Jul 30, 2003 #2
    I would imagine the mass of planets is much too small. After all, gravity is a very weak force.
     
  4. Jul 30, 2003 #3

    jcsd

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    Tail is correct, the mass of a planet is far, far too small for gravitational collapse to occur IIRC the minimum mass of a star (befiore going supernova) needed to create a black hole is thought to be in the region of 20-40 solar masses (i.e. 20-40 times the mass of our sun).
     
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