The Hubble–Lemaître law describes the observation that distant galaxies are moving away from us at speeds that increase in proportion to their distance. The Belgian priest and astronomer Georges Lemaître first derived the relationship in 1927 from Einstein's general relativity and compared it to the data then available, and the American astronomer Edwin Hubble confirmed it in 1929 with more extensive measurements. It is the basis of the idea that the universe is expanding, and it led directly to the Big Bang model. The proportionality constant, known as the Hubble constant, remains a key quantity in cosmology, and different methods of measuring it give slightly different values, a puzzle known as the Hubble tension. In 2018 the International Astronomical Union recommended using the name Hubble–Lemaître law.
Before and after
- 5 December 1926Death of Claude Monet
- from 25 December 1926 to 7 January 1989Shōwa era
- 1927Founding of Federal University of Minas Gerais
- 1927Founding of FC Dynamo Kyiv
- 1927Hubble–Lemaître law
- 1927Origins of Super League Greece
- 1927Uncertainty principle
- 1927Davisson–Germer experiment
- 1927Lemaitre proposes an expanding universe
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This moment belongs to the Modern era (1914 CE to 1945 CE), world wars and a changing world. You can also browse everything in the 20th century.