The phosphine molecule, PH3, has been proposed as a biosignature in rocky planets. In
@science.org, Burgasser et al. report phosphine in a brown dwarf atmosphere. "We therefore caution against the use of phosphine as a biosignature".
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www.science.org/doi/10.1126/...
Observation of undepleted phosphine in the atmosphere of a low-temperature brown dwarf
The atmospheres of low-temperature brown dwarfs and gas giant planets are expected to contain the phosphine molecule, PH3. However, previous observations have shown much lower abundances of this molec...
