Spiral Density Waves

Discussion in 'Astronomy, Exobiology, & Cosmology' started by TruthSeeker, Apr 2, 2004.

  1. TruthSeeker Fancy Virtual Reality Monkey Valued Senior Member

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    Can someone explain that? How does it work? Is it proven to be true?
     
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  3. Peter2003 Registered Senior Member

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  5. Starthane Xyzth returns occasionally... Valued Senior Member

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    In a disc of countless dust &/or gas particles orbiting a central gravity well, the inner parts will orbit faster than the outer according to Kepler's 3rd law. Therefore the inner particles will have the greatest anglar momentum. However, friction within the disc will tend to transfer angular momentum outward.

    If there are localised concentrations of mass in the disc, such as the giant molecular clouds found in the Milky Way, their gravitational influence will attract the particles on the next orbital out, dragging them around faster than they would normally go; those particles will then catch up with, and accumulate, other particles orbiting at the same radius.

    This in turn hastens the outflow of angular momentum along local arcs, which extend outward and become moving wavefronts, sweeping up the bulk of the matter in the disc. The result is a spiral pattern of density waves.
     
    Last edited: Apr 8, 2004
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  7. TruthSeeker Fancy Virtual Reality Monkey Valued Senior Member

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    ...
    Ok... I regret having asked it

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    EDIT: Just to explain myself... I don't think my english is good enough to understand all that...

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    Or maybe it is too technical
     
  8. TruthSeeker Fancy Virtual Reality Monkey Valued Senior Member

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  9. Peter2003 Registered Senior Member

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    Yes the entire universe is made of 3D-spiral swirls of some fundamental matter that creates what we see.
     
  10. Peter2003 Registered Senior Member

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    consider a cosmic cloud of gas/dust why should angular momentum appear and why it will not convene to a single mass.
     
  11. TruthSeeker Fancy Virtual Reality Monkey Valued Senior Member

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    Which funademental matter?

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  12. Starthane Xyzth returns occasionally... Valued Senior Member

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    @Peter2003: Yes the entire universe is made of 3D-spiral swirls of some fundamental matter that creates what we see...

    This sounds like the cosmology of Rene Descartes: a completely mechanistic philosopher, working before Galileo or Newton. He explained what we call fundamental forces (e.g. gravity, heat, light and magnetism) as the visible manifestation of continuous motion in an ether, or intangibly fine matter, which pervades all space. Friction between etheric vortices was what we perceived as radiant energy, and its pressure against the denser, solid matter of the Earth was the physical forces.

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    This all made sense at the time, but few people would take it litterally now.

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