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Originally Posted by RussT
And that Non-Baryonic Dark Matter is going directly through the sun.
SO, Non-Baryonic Dark Matter is collisionless with itself and ANY baryonic matter, which means that it has a 'straight-line' path (Unless it is completely motionless?) that cannot be altered by baryonic matter or any collisions with itself.
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The path is altered by gravity. It won't be a "straight line" unless the transverse component of its velocity is zero. Its path will be a conic section. just like any other mass.
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SO, Please explain HOW Dark Matter 'spherical' Halos can form around galaxies?
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They don't! The dark matter was there first and the baryonic matter was attracted to it.
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How is that DM halo moving, ie; is it rotating spherically with the galaxies rotation?
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The dark matter in the halo moves the same way that stars in globular clusters move. Each particle is own its own conic-section orbit.