Olbers' paradoxn.

Brit.

/ˈɒlbəz ˌparədɒks/, U.S.

/ˈɔlbərz ˈpɛrəˌdɑks/,

/ˈɑlbərz ˈpɛrəˌdɑks/

Origin: From a proper name, combined with an English element. Etymons: proper name Olbers , paradox n.

Etymology: < the genitive of the name of H. W. M. Olbers (1758–1840), German astronomer, who propounded the paradox in 1823 ( Bode's Astron. Jahrb. 1826 110) + paradox n. Compare German Olberssches Parodoxon.The paradox had been discussed previously by others, e.g. J. P. L. de Chéseaux in 1744 ( Traité de la comète qui a paru en décembre 1743 223–5). The name Olbers' paradox was introduced by Bondi (see quot. 1952).

Astronomy.

The apparent paradox that if stars were distributed uniformly throughout an infinite universe, the sky would be as bright at night as in the daytime, owing to the fact that whilst the apparent brightness of individual stars decreases with the square of the distance, the number of stars increases in the same proportion.Alternatively stated, the night sky should be as bright as the surface of the sun, because every line of sight from an observer would end on the surface of a star.The paradox is resolved by the observation that distant stars are of finite age, and recede from the observer as the universe expands.

ΘΚΠ

the world > the universe > cosmology > science of observation > theory > astronomical laws > [noun] > stars

Olbers' paradox1952

1952 H. Bondi Cosmol. iii. 23 Olbers' paradox does not arise in a static universe in which, roughly speaking, the stars did not start to radiate until some moment which can be determined..to have been between 10⁸ and 10¹⁰ years ago.

1979 J. V. Narlikar Gen. Relativity & Cosmol. xii. 185 Several unsuccessful or unsatisfactory arguments were given to falsify or resolve Olbers' paradox.

1987 J. Gribbin In Search of Big Bang (ed. 2) 93 What Olbers' paradox is telling us is that the Universe is not in thermodynamic equilibrium.

1994 P. Davies Last Three Minutes ii. 17 So if we accept Newton's resolution of the collapsing-cosmos paradox, we are back with an infinite universe again, and the problem of Olbers' paradox.

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).

单词	olbers paradox
释义	Olbers' paradoxn. Brit. /ˈɒlbəz ˌparədɒks/, U.S. /ˈɔlbərz ˈpɛrəˌdɑks/, /ˈɑlbərz ˈpɛrəˌdɑks/ Origin: From a proper name, combined with an English element. Etymons: proper name Olbers , paradox n. Etymology: < the genitive of the name of H. W. M. Olbers (1758–1840), German astronomer, who propounded the paradox in 1823 ( Bode's Astron. Jahrb. 1826 110) + paradox n. Compare German Olberssches Parodoxon.The paradox had been discussed previously by others, e.g. J. P. L. de Chéseaux in 1744 ( Traité de la comète qui a paru en décembre 1743 223–5). The name Olbers' paradox was introduced by Bondi (see quot. 1952). Astronomy. The apparent paradox that if stars were distributed uniformly throughout an infinite universe, the sky would be as bright at night as in the daytime, owing to the fact that whilst the apparent brightness of individual stars decreases with the square of the distance, the number of stars increases in the same proportion.Alternatively stated, the night sky should be as bright as the surface of the sun, because every line of sight from an observer would end on the surface of a star.The paradox is resolved by the observation that distant stars are of finite age, and recede from the observer as the universe expands. ΘΚΠ the world > the universe > cosmology > science of observation > theory > astronomical laws > [noun] > stars Olbers' paradox1952 1952 H. Bondi Cosmol. iii. 23 Olbers' paradox does not arise in a static universe in which, roughly speaking, the stars did not start to radiate until some moment which can be determined..to have been between 10⁸ and 10¹⁰ years ago. 1979 J. V. Narlikar Gen. Relativity & Cosmol. xii. 185 Several unsuccessful or unsatisfactory arguments were given to falsify or resolve Olbers' paradox. 1987 J. Gribbin In Search of Big Bang (ed. 2) 93 What Olbers' paradox is telling us is that the Universe is not in thermodynamic equilibrium. 1994 P. Davies Last Three Minutes ii. 17 So if we accept Newton's resolution of the collapsing-cosmos paradox, we are back with an infinite universe again, and the problem of Olbers' paradox. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022). < n.1952
随便看	large black pig large blue large blue butterfly large bowel large calorie large cranberry large dicky daisy lake trout lake vermilion lake-basin lake-bass lake-bed lake-coloured lake-crater lake-diver lake-dweller lake-dwelling lake-fever lake-fishery lake-fly lake-fowl lake-frith lake-front lake-girt lake-habitation