The detection of infrared emission from the dusty disk around a distant star signals the presence of the H3+ ion. The finding may provide a vital clue to how hydrogen and helium condense into gas-giant planets.
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Oka, T. Enigmatic emission. Nature 418, 31–33 (2002). https://doi.org/10.1038/418031a
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DOI: https://doi.org/10.1038/418031a
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