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2020-12-19 09:41:28
HUBBLE, Edwin.
A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae.
Washington: National Academy of Sciences, 1929. First edition. Hubble's Law, Redshift and the Expansion of the Universe. Extremely rare offprint issue of Hubble's landmark paper which "made as great a change in man's conception of the universe as the Copernican revolution 400 years before" (DSB). This paper "is generally regarded as marking the discovery of the expansion of the universe" (Biographical Encyclopedia of Astronomers). It established what would later become known as Hubble's Law: that galaxies recede from us in all directions and more distant ones recede more rapidly in proportion to their distance. "...the repercussions were immense. The galaxies were not randomly dashing through the cosmos, but instead their speeds were mathematically related to their distances, and when scientists see such a relationship they search for a deeper significance. In this case, the significance was nothing less than the realization that at some point in history all the galaxies in the universe had been compacted into the same small region. This was the first observational evidence to hint at what we now call the Big Bang" (Simon Singh, Big Bang). In the early 1920s, most astronomers believed that the universe was static and unchanging on the large scale. Einstein himself had introduced his 'cosmological constant' in 1917 to allow solutions of the equations of general relativity corresponding to a static universe. Two such solutions were found: Einstein's matter-filled universe and Willem de Sitter's empty universe. The latter model attracted much interest because it predicted reds … [Click Below for Full Description]
Bookseller: SOPHIA RARE BOOKS [Denmark]

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