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Biology, 07.10.2019 22:30 haleysmith8608
If the oort cloud contains 1012 comets, and ten new comets are discovered coming close to the sun each year, what percentage of the comets have been "used up" since the beginning of the solar system?
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If the oort cloud contains 1012 comets, and ten new comets are discovered coming close to the sun ea...
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