Wendy Freedman

Wendy Laurel Freedman (born July 17, 1957) is a Canadian-American astronomer renowned for her fundamental contributions to observational cosmology. She is best known for leading the Hubble Space Telescope Key Project, which enabled a precise determination of the Hubble constant, a key parameter for measuring the expansion of the universe. Her work has been crucial in estimating the age and size of the universe and in refining the cosmic distance scale. Throughout her career, she has developed innovative methods for measuring distances to galaxies using variable stars such as Cepheids, establishing herself as a leading figure in modern astronomy.