He is an American astrophysicist and Thomas J. Barber Professor in Space Studies at the Krieger School of Arts and Sciences, a distinguished astronomer at the Space Telescope Science Institute and a member of the National Academy of Sciences. He received his Bachelor’s Degree in Physics from the Massachusetts Institute of Technology in 1992 and his Doctorate from Harvard University in 1996.

In 2011, he was named a co-winner of the Nobel Prize in Physics and was awarded the Albert Einstein Medal for his leadership in the High-z Supernova Search Team’s discovery that the expansion rate of the universe is accelerating, a phenomenon widely attributed to a mysterious, unexplained “dark energy”, filling the universe. The discovery was named by Science magazine in 1998 as “the Breakthrough Discovery of the Year.”

His accomplishments have been recognized with a number of other awards including the MacArthur Fellowship in 2008, the Gruber Foundation Cosmology Prize in 2007 (shared) and the Shaw Prize in Astronomy in 2006.