Wendy Freedman

Astronomer Wendy Freedman studies the rate at which our universe is expanding. The director of the Carnegie Institution, she has been honoured with numerous scientific awards, including the prestigious Gruber Foundation Prize in cosmology. She is currently leading a project that uses the Spitzer satellite to measure the Hubble constant to an accuracy of two per cent. She is a member of the American Academy of Arts and Sciences, the National Academy of Sciences and the American Astronomical Society, among other associations.