Awarded to Saul Perlmutter, Brian P. Schmidt and Adam G. Riess for the discovery of the accelerating expansion of the Universe through observations of distant supernovae. The two teams of astrophysicists studied several dozen exploding stars, called supernovae, mapping the most distant ones, and reaching the conclusion based on their studies that the Universe is expanding at an ever-accelerating rate. According to the Nobel committee, their findings "have helped to unveil a Universe that to a large extent is unknown to science."