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An asteroid of a similar size to a rock that exploded above Siberia in 1908 with the force of a thousand atomic bombs whizzed close past Earth on Monday, astronomers said on Tuesday.
The gap was just 72,000 kilometers (44,750 miles), or a fifth of the distance between Earth and the Moon and only twice the height of satellites in geosynchronous orbit, the website space.com said.
Originally posted by azzllin
Two months ago we would have picked this up 10 mins after it was first spotted, three days warning, and not a word anywhere, that I can find anyhow.
I have to disagree with this. We spend so little on asteroid spotting that I can't tell you how many times we have only spotted a Near Earth Object AFTER it had gone by Earth.
Originally posted by IchiNiSan
maybe a dumb question, but in the article it mentioned "exploded above Siberia in 1908 with the force of a thousand atomic bombs "
does it means the Earth can withstand the explosions of thousands of Atomic bombs? hmmmmmmm
[edit on 4/3/09 by IchiNiSan]
The amount of energy released by fission bombs can range between the equivalent of less than a ton of TNT upwards to around 500,000 tons (500 kilotons) of TNT.
By chaining together numerous stages with increasing amounts of fusion fuel, thermonuclear weapons can be made to an almost arbitrary yield; the largest ever detonated (the Tsar Bomba of the USSR) released an energy equivalent to over 50 million tons (50 megatons) of TNT. Most thermonuclear weapons are considerably smaller than this, due for instance to practical constraints in fitting them into the space and weight requirements of missile warheads.
Unless we find these objects 6 months or more BEFORE they hit us we won't be able to do much to stop them.
Originally posted by Siren
They knew about it for some time, but, they just did not make it public.
At least, until the danger had passed.