Mary Helen Wright Greuter (December 20, 1914 – October 23, 1997) was an American astronomer and historian,[1] who wrote and edited on the history and methodology of sciences, including anthropology, archeology, mathematics, and physics.

Born in Washington, D.C., she was the daughter of the geophysicist Frederick Eugene Wright and Kathleen Ethel Finley.

[2] Through her father, who led the Carnegie Institution for Science Moon Project at the Mount Wilson Observatory, Wright became acquainted with people at Mt.

[5] Her best known works include, Explorer of the Universe: A Biography of George Ellery Hale (1966) and Sweeper of the Sky: The Life of Maria Mitchell (1949).

[7] She summered on Sagastaweka Island,[8] and maintained homes in Washington, New Jersey, and Nantucket.