1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Science Advisor
    Gold Member

    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).
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook