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Originally Posted by RussT
I agree, BUT you have to be very careful here!!!
BUT, since there can be no transverse component to its velocity it MUST be a straight line.
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Huh? Every particle of dark matter in the universe is heading straight toward (or away from) the Sun? Aren't we special!
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What NO ONE is getting is that when Einstein said "the speed of light in 'empty' space is "c" AND "space is curved by ponderable matter", that these were both talking about baryonic matter NOT being present for 'empty space' and baryonic matter (clumped) curving space.
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As far as gravity is concerned, matter is matter, whether baryonic or dark.
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SO, neither of these was taking Planck length Non-Baryonic collisionless matter into account. So this simply isn't true of Non-Baryonic Dark Matter.
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"Planck length Non-Baryonic matter" is definitely ATM. The consensus is that DM is (as yet) undiscovered supersymmetric elementary particles.
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SO those spheres (If they really exist) MUST form somehow...How?
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Gravity. See the post above by
StupendousMan for details.
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So, are you saying that the spherical halo is rotating with the influence of the SMBH in the center of the galaxy as its main source of gravitational influence?
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No! I'm saying that each individual particle of DM is orbiting the barycenter of the galaxy (baryonic
and nonbaryonic). The (baryonic) mass of the galaxy is on theorder of 200
billion solar masses. Against that, the 2 or 4
million solar masses of the SMBH is negligible outside of the core.