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Eddington Expedition

LIGO first detects gravitational waves

VLTI/Gravity provides first observation of material orbiting close to the point of no return

The first image of a black hole
Telescopes
Scientific developments
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Eddington Expedition

29/05/1919View on timeline
How an Eclipse Proved Einstein Right
Original Caption: In Plate 1 is given a half-tone reproduction of one of the negatives taken with th...

On May 29, 1919, a total solar eclipse provided the ideal opportunity to experiment something predicted by Einstein's General Theory of Relativity: a small change in the position of stars around the sun, which is usually impossible to be seen due to the sun's brightness. Two different expeditions were organized: Arthur Eddington and Frank Watson Dyson travelled to the Island of Principe, and Andrew Claude de la Cherois Crommelin and Charles Rundle Davidson travelled to Sobral, Brazil.

The blue belt shows the regions where the eclipse was totally visible; both the island of Principe a...
Read the full original report of the expedition:A Determination of the Deflection of Light by the Sun's Gravitational Field, from Observations Made...
Sir Arthur Stanley Eddington (1882–1944) was an English astronomer, physicist, and mathematician of...

Sir Arthur Stanley Eddington on Wikipedia

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Published in 10/04/2019

Updated in 19/02/2021

All events in the topic Scientific developments:


29/05/1919Eddington ExpeditionEddington Expedition
Scientific developments
10/04/2019 • 10:00:00The first image of a black hole is presented to the publicThe first image of a black hole is presented to the public
Scientific developments
05/04/2017The telescope first aims at M87 galaxy center
Scientific developments
28/04/2017Katie Bouman's TED Talk
Scientific developments
04/11/191525/11/1915Einstein submits his papers on the General Theory of RelativityEinstein submits his papers on the General Theory of Relativity
Scientific developments
01/01/1781Discovery of the M87 galaxyDiscovery of the M87 galaxy
Scientific developments
01/01/196501/01/1967First developments of very long baseline interferometry (VLBI)
Scientific developments
01/01/2009Creation of the Event Horizon Telescope (EHT)
Scientific developments
27/11/1783John Michell first imagined "black holes"John Michell first imagined "black holes"
Scientific developments
22/12/1915Karl Schwarzschild solves Einstein's equationsKarl Schwarzschild solves Einstein's equations
Scientific developments
01/01/1995Existence of black holes is confirmed
Scientific developments
01/01/1978Dense mass at the center of M87 galaxy is theorized
Scientific developments
01/01/1972Dense mass at the center of the Milky Way is calculated
Scientific developments
12/03/1954First accurate measurement of gravitational redshiftFirst accurate measurement of gravitational redshift
Scientific developments
11/03/1968Shapiro time delayShapiro time delay
Scientific developments
01/01/1976Gravity Probe A confirms gravitational time dilation
Scientific developments
01/01/1978First successful mm-VLBI observations
Scientific developments
01/01/19941.3 mm VLBI observations between IRAM telescopes
Scientific developments
11/01/1995 • 18:35:00Tremendous Mass Concentration in Strange Galaxy Revealed by VLBATremendous Mass Concentration in Strange Galaxy Revealed by VLBA
Scientific developments
07/12/1999Viewing the shadow of the black hole at the galactic center, by Falcke et al.Viewing the shadow of the black hole at the galactic center, by Falcke et al.
Scientific developments
01/01/2003VLBI observations at 147 GHz
Scientific developments
04/05/2011Gravity Probe B confirms frame dragging
Scientific developments
01/01/2012Discovery of event horizon scale structure within M87
Scientific developments
05/03/2015First Very Long Baseline Observations performed by ALMA
Scientific developments
11/02/2016LIGO first detects gravitational wavesLIGO first detects gravitational waves
Scientific developments
12/04/2019Katie Bouman's talk at Caltech
Scientific developments
31/10/2018VLTI/Gravity provides first observation of material orbiting close to the point of no returnVLTI/Gravity provides first observation of material orbiting close to the point of no return
Scientific developments
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