How Relativity Was Validated

For over two centuries, Newton’s law of gravity accurately predicted the motions of all the planets in the solar system. But that all changed in 1859, when French astronomer Urbain Le Verrier discovered a strange anomaly regarding mercury’s orbit. This led to a problem in Newton's reality that didn't have an answer until Albert Einstein proposed General Relativity in 1915. Einstein accurately modeled Mercury's orbit with GR, but it wasn't enough for his theory to be accepted as fact. He needed to predict a testable anomaly that had been previously unobserved, and one of his predictions was light bending around the Sun. In 1919, that prediction was put to the test, and what was found would make Einstein a worldwide celebrity practically overnight.