Three scientists shared the 2011 Nobel Prize in Physics, announced Staffan Normark, Permanent Secretary of Swedish Royal Academy of Sciences in Stockholm on Tuesday.

The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Physics for 2011 with one half to Saul Perlmutter from the United States with the Supernova Cosmology Project, and the other half jointly to Brian P. Schmidt with the High-z Supernova Search Team in Australia and Adam G. Riess from the United States "for the discovery of the accelerating expansion of the Universe through observations of distant supernovae," Normark said.