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
1964 — The first recorded use of the term "black hole", by journalist Ann Ewing
1965 — Ezra T. Newman, E. Couch, K. Chinnapared, A. Exton, A. Prakash, and Robert Torrence solve the Einstein–Maxwell field equations for charged rotating systems
1966 — Yakov Zel’dovich and Igor Novikov propose searching for black hole candidates among binary systems in which one star is optically bright and X-ray dark and the other optically dark but X-ray bright (the black hole candidate)
1994 — Charles Townes and colleagues observe ionized neon gas swirling around the center of our Galaxy at such high velocities that a possible black hole mass at the very center must be approximately equal to that of 3 million suns
^ abcdeThorne, Kip S. (1994). Black holes and time warps : Einstein's outrageous legacy. New York. ISBN 0393035050. OCLC 28147932.
^Ferrarese, Laura; Ford, Holland (February 2005). "Supermassive Black Holes in Galactic Nuclei: Past, Present and Future Research". Space Science Reviews. 116 (3–4): 523–624. arXiv:astro-ph/0411247. Bibcode:2005SSRv..116..523F. doi:10.1007/s11214-005-3947-6. S2CID 119091861. it is fair to say that the single most influential event contributing to the acceptance of black holes was the 1967 discovery of pulsars by graduate student Jocelyn Bell. The clear evidence of the existence of neutron stars – which had been viewed with much skepticism until then – combined with the presence of a critical mass above which stability cannot be achieved, made the existence of stellar-mass black holes inescapable.
^Genzel, R; Hollenbach, D; Townes, C H (1994-05-01). "The nucleus of our Galaxy". Reports on Progress in Physics. 57 (5): 417–479. Bibcode:1994RPPh...57..417G. doi:10.1088/0034-4885/57/5/001. ISSN 0034-4885.
^ Scientific American – Big Gulp: Flaring Galaxy Marks the Messy Demise of a Star in a Supermassive Black Hole