Science General Discussion

Started by Legend, Sep 02, 2014, 07:17 PM

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the-pi-guy


Legend

https://www.reddit.com/r/askscience/comments/drggcs/why_do_cosmologists_hypothesize_the_existence_of/f6izyaa/
Their one point about colliding galaxies made me skeptical since planets and stars survive stuff like that but I didn't realize 90% of the galaxy's mass was from hot gass.


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