Cosmology By inshaaaa._ Apr 27, 1687 Isaac Newton 3 Laws of Motion Apr 29, 1787 Pierre Simon Laplace Discovered the moons around Uranus Apr 29, 1812 William Herschel Made the Analytic theory of probability Apr 29, 1913 accepted by the International Committee of Photographic Magnitudes Apr 29, 1915 completes his General Theory of Relativity. Jan 18, 1918 Wrote to Eddington abouot new breakthrough Apr 29, 1919 became director of the Leiden Observatory. Apr 29, 1929 Discovered the farther a galaxy is from Earth, the faster it appears to move away Apr 29, 1930 discovery of Pluto Apr 29, 1933 Lemaître found an important inhomogeneous solution of Einstein's field equations describing a spherical dust cloud Apr 29, 1946 showed that the cores of stars will evolve to temperatures of billions of degrees Apr 29, 1964 Arno Penzias and Rober Wilson Used a large antenna to map the stars of the Milky way