What specific reduced form of phosphorus was detected on Comet 67P, indicating incorporation during solar system formation?

Answer

Phosphine

Researchers detected phosphine on Comet 67P, a molecule that contains phosphorus in a reduced state, confirming that this critical element was present in the comet's ices during its formation.

What specific reduced form of phosphorus was detected on Comet 67P, indicating incorporation during solar system formation?
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