Quote:
Originally Posted by Sunfish
Half a kilometre is still a large chunk of ice. I think the one that caused the 4.5 km Goss Bluff crater was about 1km.
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Hi Ray,
And if it hit us whilst it was moving at 177,000 km/h and in the worse
case combined with the Earth's orbital speed of 107,000 km/h head-on,
then it would certainly get everyone's attention.