Hubble Telescope tracks a dwarf galaxy's stars to map out dark matter

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By measuring the motions of stars in the Draco dwarf galaxy, the Hubble Space Telescope was able to map the density profile of dark matter.

Hubble Telescope tracks a dwarf galaxy's stars to map out dark matter : Read more

 

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With some regards to the normal visible matter,this is safe to relate that dark matter does not clump to form stsr;but,have usual effect of gravity due to mutual interaction or interaction with common matter.Dark matter,even does not interact with light.