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Did Earth's water come from comets?
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Did Earth's water come from comets?
It is known that about one atom of every 3200 water molecules in the ocean is a heavy water molecule with deuterium, which is a hydrogen atom with a extra neutron. This chemical ratio is similar in Hartley 2, suggesting Earth's water came from a comet.
Earth's water, comets, Hartley 2
ChaitanyaG
Rossmoyne Senior High School