Three scientists won this year's Nobel Prize in physics Tuesday for advancing our understanding of black holes, the all-consuming monsters that lurk in the darkest parts of the universe. Briton Roger Penrose received half of this year's prize "for the discovery that black hole formation is a robust prediction of the general theory of relativity," the Nobel Committee said. German Reinhard Genzel and American Andrea Ghez received the second half of the prize "for the discovery of a supermassive compact object at the center of our galaxy." The prize celebrates "one of the most exotic objects in the universe," black holes, which have become a staple of science fact and science fiction and where time seems to stand still, according to the committee. Black holes are perhaps the most mysterious and powerful objects in astronomy.