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"Astronauts" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

MeSH information
Members of spacecraft crew including those who travel in space, and those in training for space flight. (From Webster, 10th ed; Jane's Aerospace Dictionary, 3d ed)

This graph shows the total number of publications written about "Astronauts" by people in Harvard Catalyst Profiles by year, and whether "Astronauts" was a major or minor topic of these publication.