Now a professor of physics and astronomy at Michigan State University, she researches galaxy clusters and baryonic matter (matter made of protons and neutrons, as opposed to dark matter) in an effort to learn more about the composition of the universe and its evolution.
“Clusters of galaxies are very large scoops of the universe,” says Donahue, who served as president of the American Astronomical Society from 2018 to 2020. “It’s like taking a sample from the ocean. If you’re trying to find out the average composition of the ocean’s water, you’d want to study as big a scoop as possible.”
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