The first detection of emission from carbon monoxide molecules in a circumstellar envelope delivered a tool for estimating numerous physical characteristics of evolved stars, not least the amount of gas and dust they return to the interstellar medium of a galaxy.
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Olofsson, H. Expanding the envelope. Nat Astron 3, 478–479 (2019). https://doi.org/10.1038/s41550-019-0774-3
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DOI: https://doi.org/10.1038/s41550-019-0774-3
