A century ago Einstein put forth his theory of gravity. For the first 50 years it was an exotic theory with many untestable predictions thought to be irrelevant to our Universe. Beginning 50 years ago with the discovery of quasars and the cosmic microwave background (CMB), it has become clear that we live in Einstein’s Universe where the extraordinary is now the ordinary and his theory is in full bloom. To study the Universe today you have to understand the cosmic implications of Einstein's theory. We will focus on observable aspects of some of the most outrageous and compelling predictions of general relativity. These predictions include black holes, gravitational waves, gravitational lensing, and the Big Bang. We will explore the recent detection of gravitational waves from the merger of black holes 30 times the mass of our Sun, the spectacular fireworks associated with the death of stars and the formation of neutron stars and black holes, precise measurements of properties of the supermassive black hole at the center of our galaxy, the bending of light due to the gravity of clusters of galaxies, and how we learn about the origin of space, time, and the earliest moments of the Universe.