Dark Matter Halo

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We believe that most of the matter in the universe is dark, i.e. cannot be detected from the light which it emits (or fails to emit). This is “stuff” which cannot be seen directly — so what makes us think that it exists at all? 

We believe that our galaxy is surrounded by an enormous spherical cloud of dark matter: material which is not composed of ordinary protons, electrons and neutrons, but of some other sort of elementary particles. As its name indicates, this material doesn’t emit as much light per kilogram as stars do.

Why do we believe in this mysterious material?

 ”Keplerian rotation.”

 Information from http://spiff.rit.edu/classes/phys301/lectures/mw/mw.html

One Response to “Dark Matter Halo”

  1. This is obvious proof of alien intervention, how could a person living in the middle ages possibly have knowledge of planetry motion. Also if you rearrange the name Kepler it spells Rpkeel (obviously an alien name)

    Also Kepler was only an assistant to astronomer Tycho Brahe (a dead give away alien as he had a metal nose and an alien name)

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