“Belgiums” are also used to measure unearthly objects…

“A one kilometre asteroid striking the Earth at a typical speed of 25 to 30 kilometres per second would have a devastating effect. On impact the enormous kinetic energy of the body will instantaneously be dumped into target rock in an explosion equivalent to 300,000 megatons of TNT – the largest man-made nuclear weapon had a yield of 60 megatons. Flash and blast from the impact will destroy an area the size of Belgium.”

“In 1908 an asteroid explosion over Siberia visited ruin on an area the size of Belgium.”

And some more arithmetic …

…Luxembourg x 7 = Belgium

“Seven rocks the size of Luxemburg would probably do just as much damage as one the size of Belgium.”

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