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Water Ball with Sun's Mass - It's Diameter?

  1. May 8, 2013 #1
    (For recreation)

    Assuming (from Wikipedia) that the mass of the Sun is 2 x [itex]10^{30}[/itex] Kg,

    I wondered what would be the size of an equivalently-massed ideal ball of water at STP with uniform density?

    I read there the Sun is about 109 Earth diameters. My water ball model calculation is ~123 Earth diameters.

    Anybody care to please confirm/correct?
     
  2. jcsd
  3. May 8, 2013 #2

    mfb

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    The number looks reasonable, as the density of the sun is a bit above the density of water.
    It is impossible to have such a ball, of course.
     
  4. May 8, 2013 #3
    Keep in mind I already used the word 'ideal'.
     
  5. May 9, 2013 #4

    mfb

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    Sure, I just wanted to mention it. Such a ball would probably collapse until fusion of its hydrogen atoms starts inside. Alternatively, if the object stays too cold to start fusion, it might become a white dwarf.
     
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