= Gravity's Century =
=== From Einstein's Eclipse to Images of Black Holes ===
=== 2019 Ron Cowen Beaverton 530.11 COW ===
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 .p47 British Cambridge astronomer Arthur Eddington pacifist Quaker
 .p49 Einstein's 1916 papers via Dutch Willem de Sitter, starlight deflection 1.75 arc seconds
 .p57 May 29, 1919 rotating mirror coelostat reflects light into telescope - 16 inch failed, separate 8 inch worked
 .p65 results presented to royal society November 6, 2019
 .p100 UBC Vancouver theorist Mark Van Raamsdonk, April 2010 rejection from ''Journal of High Energy Physics'', also from ''General Relativity and Gravitation'', but shorter essay won the Gravity Research Foundation's annual contest and printed June 2010 in G.R.G.
 . [[ https://link.springer.com/article/10.1007/s10714-010-1034-0#article-info | Paywall Article ]]  [[ https://arxiv.org/pdf/1005.3035 | Arxiv.org ]]
 .p148 [[ https://en.wikipedia.org/wiki/Large_Millimeter_Telescope | Large Millimeter Telescope ]] in Mexico
 .p151 [[ https://en.wikipedia.org/wiki/Event_Horizon_Telescope | Event Horizon Telescope ]], very long baseline array of 11 radio telescope arrays at 1.3 mm imaging quasar emissions deflected by the Sagittarius A* black hole 26,000 ly away in center of galaxy, 3e-15 atomic clocks and terabyte data recorders
 .p157 "tau" opacity of water vapor in atmosphere, April 2018 ... data combined in 2019