Timeline of black hole physics
 1640 — Ismaël Bullialdus suggests an inversesquare gravitational force law
 1676 — Ole Rømer proves that light has a finite speed
 1684 — Isaac Newton writes down his inversesquare Law of universal gravitation
 1758 — Rudjer Josip Boscovich develops his Theory of forces, where gravity can be repulsive on small distances. So according to him strange classical bodies, such as white holes, can exist, which won't allow other bodies to reach their surfaces
 1784 — John Michell discusses classical bodies which have escape velocities greater than the speed of light
 1795 — Pierre Laplace discusses classical bodies which have escape velocities greater than the speed of light
 1798 — Henry Cavendish measures the gravitational constant G
 1876 — William Kingdon Clifford suggests that the motion of matter may be due to changes in the geometry of space
 1909 — Albert Einstein, together with Marcel Grossmann, starts to develop a theory which would bind metric tensor g_{ik}, which defines a space geometry, with a source of gravity, that is with mass
 1910 — Hans Reissner and Gunnar Nordström defines ReissnerNordström singularity, Hermann Weyl solves special case for a pointbody source
 1916 — Karl Schwarzschild solves the Einstein vacuum field equations for uncharged sphericallysymmetric nonrotating systems
 1917 — Paul Ehrenfest gives conditional principle a threedimensional space
 1918 — Hans Reissner and Gunnar Nordström solve the Einstein–Maxwell field equations for charged sphericallysymmetric nonrotating systems
 1918 — Friedrich Kottler gets Schwarzschild solution without Einstein vacuum field equations
 1923 — spacetime geometry is the unique spherically symmetric solution of the Einstein vacuum field equations
 1931 — Subrahmanyan Chandrasekhar calculates, using special relativity, that a nonrotating body of electrondegenerate matter above a certain limiting mass (at 1.4 solar masses) has no stable solutions.
 1939 — Robert Oppenheimer and Hartland Snyder calculate the gravitational collapse of a pressurefree homogeneous fluid sphere
 1958 — David Finkelstein theorises that the Schwarzschild radius of a black holes is a causality barrier: an event horizon
 1963 — Roy Kerr solves the Einstein vacuum field equations for uncharged symmetric rotating systems, deriving the Kerr metric
 1964 — Roger Penrose proves that an imploding star will necessarily produce a singularity once it has formed an event horizon
 1964 — The first recorded use of the term 'Black Hole' by a journalist Ann Ewing
 1965 — Ezra T. Newman, E. Couch, K. Chinnapared, A. Exton, A. Prakash, and Robert Torrence solve the EinsteinMaxwell field equations for charged rotating systems
 1967 — Werner Israel presented the proof of the nohair theorem at King's College London
 1967 — John Wheeler helps to popularize the term "black hole"
 1968 — Brandon Carter uses Hamilton–Jacobi theory to derive firstorder equations of motion for a charged particle moving in the external fields of a KerrNewman black hole
 1969 — Roger Penrose discusses the Penrose process for the extraction of the spin energy from a Kerr black hole
 1969 — Roger Penrose proposes the cosmic censorship hypothesis
 1971 — Identification of Cygnus X1/HDE 226868 as a binary black hole candidate system
 1972 — Stephen Hawking proves that the area of a classical black hole's event horizon cannot decrease
 1972 — James Bardeen, Brandon Carter, and Stephen Hawking propose four laws of black hole mechanics in analogy with the laws of thermodynamics
 1972 — Jacob Bekenstein suggests that black holes have an entropy proportional to their surface area due to information loss effects
 1974 — Stephen Hawking applies quantum field theory to black hole spacetimes and shows that black holes will radiate particles with a blackbody spectrum which can cause black hole evaporation
 1989 — Identification of GS2023+338/V404 Cygni as a binary black hole candidate system
 2002 — Astronomers at the Max Planck Institute for Extraterrestrial Physics present evidence for the hypothesis that Sagittarius A* is a supermassive black hole at the center of the Milky Way galaxy
 2002 — NASA's Chandra Xray Observatory identifies double galactic black holes system in merging galaxies NGC 6240
 2004 — Further observations by a team from UCLA present even stronger evidence supporting Sagittarius A* as a black hole.
 2012 — First visual proof of existence of blackholes. Suvi Gezari's team in Johns Hopkins University, using the Hawaiian telescope PanSTARRS 1, publish images of a supermassive black hole 2.7 million lightyears away swallowing a red giant.^{[1]}
References
 ^ [1] Scientific American  Big Gulp: Flaring Galaxy Marks the Messy Demise of a Star in a Supermassive Black Hole
See also
