Angular Momentum in Galaxies: Thread C

Discussion in 'Astronomy, Exobiology, & Cosmology' started by Erring Flatley, Mar 16, 2005.

  1. Erring Flatley Erring Flatley Registered Senior Member

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    Thread C: For persons who know Einstein's first two postulates: Explain the increase in localized angular momentum when galaxies form while maintaining universal angular momentum.
     
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  3. blobrana Registered Senior Member

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    Hum,
    The universal angular momentum is generally supposed to equal zero.
    in an `enclosed system` such as the universe , all the `localized angular momentums` effectively cancel out - the sum is still zero, imho.
     
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  5. Erring Flatley Erring Flatley Registered Senior Member

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  7. James R Just this guy, you know? Staff Member

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    When a galaxy forms, the total angular momentum of the system is fixed. It does not increase, as you claim.
     
  8. cato less hate, more science Registered Senior Member

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    Yeah, it is conserved. Thus things move faster as they spiral in, but there is no change in angular momentum.
     
  9. Erring Flatley Erring Flatley Registered Senior Member

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    If the total angular momentum of a galaxy where constant throughout its lifespan, and it began as widely dispersed interstellar matter, it would eventually collapse into its center. Galaxies have somehow reached a semisteady state in which the angular momentum balances the intergravitational attraction. Something has set them spinning. They cannot fall into this steady state. There is another source of interaction that is preventing the galaxial mater from falling into a common center. It is not angular momentum. Initial angular momentum is insufficient to overcome a collapse once a collapse begins. Galaxies condense into existence they do not collapse into existence. There is another force at play for which there is no account.
     
  10. James R Just this guy, you know? Staff Member

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    Erring Flatley,

    I have responded to the substance of your last post in "Thread A".
     

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