In this Sept. 19, 2008, handout photo provided by the John D. and Catherine T. MacArthur Foundation, astronomer Adam Riess sits in his office at Johns Hopkins University in Baltimore. The Royal Swedish Academy of Sciences says American Saul Perlmutter, U.S.-Australian citizen Brian Schmidt and U.S. scientist Adam Riess share the 2011 Nobel Prize in physics. (AP Photo/The John D. and Catherine T. MacArthur Foundation, Gail Burton

Photo by: Gail Burton

In this Sept. 19, 2008, handout photo provided by the John D. and Catherine T. MacArthur Foundation, astronomer Adam Riess sits in his office at Johns Hopkins University in Baltimore. The Royal Swedish Academy of Sciences says American Saul Perlmutter, U.S.-Australian citizen Brian Schmidt and U.S. scientist Adam Riess share the 2011 Nobel Prize in physics. (AP Photo/The John D. and Catherine T. MacArthur Foundation, Gail Burton