Abstract
MOLECULAR hydrogen is very stable at low temperatures, and is therefore likely to be found in large quantities within interstellar dark clouds which are not penetrated by ultraviolet radiation (which destroys molecular bonds).
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MACCACARO, T., SIRONI, G. An interstellar H2 indicator in direction of the Crab Nebula. Nature 259, 26–27 (1976). https://doi.org/10.1038/259026a0
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DOI: https://doi.org/10.1038/259026a0
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