Mass is the fundamental parameter in stellar astrophysics, but measuring mass is difficult, especially for young stars. A study of a youthful neighbour of the Sun provides insight into the accuracy of widely used calibrations.
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Reid, I. Weighing the baby. Nature 433, 207–208 (2005). https://doi.org/10.1038/433207a
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DOI: https://doi.org/10.1038/433207a
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