Hydrogen Hydrogen everywhere, Andromeda, Milky Way

Discussion in 'Astronomy, Exobiology, & Cosmology' started by nebel, Apr 19, 2017.

  1. nebel Valued Senior Member

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    what is the relation between the hard to detect Hydrogen Halo, and the invisible DM Halo?
     
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  3. danshawen Valued Senior Member

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