M87 Black Hole Size Comparison https://t.co/wwzQ44nO8a https://t.co/wKfeSkW6U9 pic.twitter.com/pfRPc17O2D— XKCD Comic (@xkcdComic) April 10, 2019
M87 Black Hole Size Comparison https://t.co/wwzQ44nO8a https://t.co/wKfeSkW6U9 pic.twitter.com/pfRPc17O2D