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Deuterium in Comets Tell Interesting Tales
Comets have play an interesting role in astronomy history. From antiquity, many cultures saw them omens or spirits, portending good or bad news for kings, queens, and emperors. Over the past few hundred years, however, astronomers have studied them intently to understand the science behind these visitors to the inner Solar System. Today we know that these ghostly apparitions in the sky are made of dirty balls of ice and rock blasting through space, scattering dust and gases as they go.
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