Wendy Freedman — SPARQNOW

At-a-Glance

Listed by Time magazine as one of the world's 100 most influential people in 2025.
John & Marion Sullivan University Professor of Astronomy and Astrophysics at the University of Chicago.
Best known for her measurement of the Hubble constant, determining the size and age of the visible universe.
Co-leader of the Hubble Space Telescope Key Project, which published its final result in 2001.
Initiated the Giant Magellan Telescope (GMT) Project and chaired its board of directors from 2003 to 2015.
Received her Ph.D. in astronomy and astrophysics from the University of Toronto in 1984.

Biography

Wendy Laurel Freedman is a Canadian-American astronomer and the John & Marion Sullivan University Professor of Astronomy and Astrophysics at the University of Chicago. She is widely recognized for her measurement of the Hubble constant, a key quantity that determines the size and age of the visible universe.