Le Verrier's and Einstein's Predictions for Precession of Perihelia

The discovery and attempts to find classical causes for the precession of the perihelion of the planet Mercury are well known.[ref_1] In the 19th century, the French astronomer Le Verrier found that the perihelion of Mercury advanced by 43 arc- seconds/100y, an amount which could not be accounted for in terms of the gravitational forces exerted on Mercury by the other known planets. Le Verrier assumed another planet, which he named Vulcan, existed between Mercury and the Sun. However, observa…