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First developments of very long baseline interferometry (VLBI)

01/01/196501/01/1967

The technology that allowed us to get the first image of a black hole is called Very Long Baseline Interferometry, or VLBI. It was mainly developed through the efforts of separate teams, in the late 1960s. The article below is a brief review of the history of VLBI, written by one of the researchers involved in its development.A Review of the History of VLBI, by B. G. Clark (PDF)
Very Long Baseline Interferometry
Very Long Baseline Interferometry

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Published in 12/04/2019

Updated in 19/02/2021

All events in the topic Scientific developments:


29/05/1919Eddington ExpeditionEddington Expedition
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
05/04/2017The telescope first aims at M87 galaxy center
28/04/2017Katie Bouman's TED Talk
04/11/191525/11/1915Einstein submits his papers on the General Theory of RelativityEinstein submits his papers on the General Theory of Relativity
01/01/1781Discovery of the M87 galaxyDiscovery of the M87 galaxy
01/01/196501/01/1967First developments of very long baseline interferometry (VLBI)
01/01/2009Creation of the Event Horizon Telescope (EHT)
27/11/1783John Michell first imagined "black holes"John Michell first imagined "black holes"
22/12/1915Karl Schwarzschild solves Einstein's equationsKarl Schwarzschild solves Einstein's equations
01/01/1995Existence of black holes is confirmed
11/03/1968Shapiro time delayShapiro time delay
01/01/1978First successful mm-VLBI observations
01/01/19941.3 mm VLBI observations between IRAM telescopes
11/01/1995 • 18:35:00Tremendous Mass Concentration in Strange Galaxy Revealed by VLBATremendous Mass Concentration in Strange Galaxy Revealed by VLBA
01/01/2003VLBI observations at 147 GHz
04/05/2011Gravity Probe B confirms frame dragging
11/02/2016LIGO first detects gravitational wavesLIGO first detects gravitational waves
12/04/2019Katie Bouman's talk at Caltech