Deuterium and Dust: Comet 67P Reveals a New Side of Earth's Water Origins

The study highlights how deuterium-enriched water binds to cometary dust, causing measurement discrepancies. As dust travels farther from the comet's core, deuterium-rich water is lost, allowing precise measurements of the comet's body. This breakthrough reshapes our understanding of cometary water’s origins and its connection to Earth's, offering insights into the early solar system's formation.

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