WF
Wendy Freedman
Canadian-American astronomer
b. 1957age 69Living
An astronomer who led the Hubble Space Telescope Key Project, delivering one of the most precise measurements yet made of the Hubble constant — the rate at which the universe is expanding. As director of the Carnegie Observatories and now a professor at the University of Chicago, she has continued probing whether the standard cosmological model is missing physics; Time named her one of the world's 100 most influential people in 2025.