Dark Matter & Galactic Clusters  (4:27)

 

Thousands of galaxies cluster together to form the largest structures in the universe.

 

Mysterious matter called Dark Matter provides the bulk of gravity that is required to hold those super structures gravitationally bound together. We cannot see nor collide with this dark matter however we can detect its gravity. Dark matter provides six times more gravity than Normal Matter (six times more than Stars, Planets...):

 

 

By mass, Normal Matter is 1/7 the total mass in the Universe, however Dark Energy dominates the Universe by far.

 

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