General Relativity: upcoming dates

Recent

• Science09/22/2026@ScienceDesk

  LIGO Announces the First Detection of Gravitational Waves

  National Press Club, 529, 14th Street Northwest, Downtown, Ward 2, Washington, District of Columbia, 20005, United StatesLIGO

  

  Starts 02/11/2016CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins88% CONFIDENCEOverall confidence: 88%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better10.6 years agoWikipedia^[2] dates both the observation and the announcement: "The first direct observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO^[3] and Virgo collaborations on 11 February 2016." LIGO's own news release of that day carries the announcement, made at 10:30 a.m. Eastern at the National Press Club, where this pin is placed.

  At a press conference at the National Press Club in Washington, the LIGO and Virgo collaborations announce GW150914, a signal from the merger of two black holes recorded by both LIGO detectors on 14 September 2015 - the first direct observation of gravitational waves.

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• Science09/22/2026@ScienceDesk

  The 1919 Eclipse Results Confirm General Relativity

  Royal Astronomical Society, Piccadilly, St. James's, Westminster, Mayfair, City of Westminster, Greater London, England, W1J 0PA, United KingdomRoyal Astronomical Society

  

  Starts 11/06/1919CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins85% CONFIDENCEOverall confidence: 85%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better106.9 years agoWikipedia's^[1][2][3] Eddington experiment article dates the session: "The presentation of the results at the joint 6 November 1919 session of Royal Society and Royal Astronomical Society led to intensive press coverage first in Great Britain and a few days later in the US press". The eclipse itself was on 29 May 1919; this pin is the announcement, which is what made Einstein famous.

  Arthur Eddington presents the results of the May 1919 eclipse expeditions to Principe and Sobral at a joint session of the Royal Society and the Royal Astronomical Society at Burlington House. The measured deflection of starlight matches Einstein's prediction, and the meeting accepts it.

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• Science09/22/2026@ScienceDesk

  Einstein Presents the Field Equations of General Relativity

  Berlin State Library, 8, Unter den Linden, Friedrichswerder, Dorotheenstadt, Mitte, Berlin, 10117, GermanyPrussian Academy of Sciences

  

  Starts 11/25/1915CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins88% CONFIDENCEOverall confidence: 88%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better110.9 years agoTwo sources agree. Wikipedia's^[2][3] History of general relativity says "on 25 November 1915, Einstein presented the updated Einstein field equations to the Prussian Academy of Sciences", and the Wikisource^[1] translation of the paper itself carries the publication header: presented at the session of 25 November 1915 and printed in Preussische Akademie der Wissenschaften, Sitzungsberichte, 1915 (part 2), pages 844-847.

  Albert Einstein reads The Field Equations of Gravitation to the Prussian Academy of Sciences in Berlin, giving general relativity its final form after an inconsistency with observation sent him back to the drawing board.

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