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100 YEARS OF THE IAU

Expanding the envelope

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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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Fig. 1

NRAO/AUI/NSF

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Correspondence to Hans Olofsson.

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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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