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Xkcd: M87 Black Hole Size Comparison
by
G8WyaX
on 4/11/2019, 5:58:30 AM with
1
comment
by
clintonb
on 4/11/2019, 7:31:44 AM
Why not post to the original content?
https://xkcd.com/2135/
Why not post to the original content?
https://xkcd.com/2135/