Look at the light coming off the far side of the sun post-impact.<p>It's almost unbelievable how an object "tens of meters" in diameter can affect an object nearly 1.4 Billion meters in diameter.<p>Just startling.<p>(Note, comets average 20k mph, so we're still talking maybe 2/1000th's of a percent of c, right? It's not like it's a relativistic bomb or anything... yet billions of meters away, a light burst nearly instantaneous upon impact.)