acrionx opened this issue on Oct 05, 2010 · 394 posts
nruddock posted Tue, 19 October 2010 at 1:38 PM
Quote - > Quote - chunk of steel size of a Man's head fired from orbit could vapourize a city.
A chunk of steel the size of a man's head would burn up before hitting the ground!
Something moving at even a small fraction of the speed of light (say 0.05c) would only take a few seconds to pass through the atmosphere.
Something small enough could turn completely plasma, but that wouldn't really limit the devastation caused, and could quite possibly might make it worse.