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Artikel 112420-01


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112420-01  Hubble, Edwin.
N.G.C. 6822, A Remote Stellar System. (25,5 x 17 cm). 25 S. Mit 1 Tafeln und 3 Abbildungen. Original-Broschur. (Sonderdruck aus: Astrophysical Journal).
(Chicago, University of Chicago Press), 1925.
Erste Ausgabe seiner ersten ausführlichen Arbeit über ein extragalaktisches System. - "During the late 1920's Hubble's main preoccupation was to determine a reliable extragalactic distance scale to the limits of observation. This was the essential preliminary to any serious investigation of the distribution of galaxies in space and its bearing on the cosmological problem. The philosophy underlying his approach to this problem had previously been summarized by him in his first detailed paper on an extragalactic system (NGC 6822), the distance of which was obtained by the Cepheid criterion. Hubble's use of the Cepheid period-luminosity law (which enabled him to regard these stars as distance indicators) was based on an appeal to the principle of the uniformity of nature. 'This principle,' he wrote, 'is the fundamental assumption in all extrapolations beyond the limits of known and observable data, and speculations which follow its guide are legitimate until they become self-contradictory'" (DSB ). - Hubble (1889-1953) war der Begründer der modernen extragalaktischen Astronomie und der erste, der die Rotverschiebung der Sterne beobachtete und damit den Nachweis für die Expansion des Universums lieferte. - Stempel auf Einband und verso Tafel, sonst gut erhalten. - DSB 6, 528

650 €