This is what happens when a 1.7 g aluminium ball hits an 18-cm thick block of aluminium at 6.8 kilometres per second Posted on 2021/11/16 by Carl Robitaille This is what happens when a 1.7 g aluminium ball hits an 18-cm thick block of aluminium at 6.8 kilometres per second.Which is about 15% slower than the @Space_Station's orbital velocity. pic.twitter.com/fXltcpCg5S— Paul Byrne (@ThePlanetaryGuy) November 15, 2021