Astronomy - The Size of the Universe (4 of 6) The Local Group of Galaxies

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1. Thanks . Good Info and well explained
2. your bow ties are awesome!
3. Is gravity holding our cluster together? That would be some strong gravity.
4. Hi!
   Do you have some sort of a PhD around the wonderful chapter of physics?
   In that case, which part?
   
   Regards
   Hobby physicist - Student from Norway