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单词 gegenschein
释义

gegenscheinn.

/ˈɡeɪɡənʃʌɪn/
Forms: Also Gegenschein.
Etymology: German, < gegen opposite + schein shine, glow; first used technically by T. J. C. A. Brorsen 1854, in Unterhaltungen im Gebiete der Astron. 17 May 156, after an earlier use in the same connection by F. H. A. von Humboldt c1803, published in his Kosmos (1845) I. 144.
Astronomy.
A patch of very faint nebulous light occurring in the ecliptic opposite the sun. Cf. counter-glow n.
ΘΚΠ
the world > the universe > luminous appearance > [noun] > gegenschein
counter-glow1852
gegenschein1880
1880 Amer. Jrnl. Sci. 120 442 The gegenschein is an extremely faint spot of light some 7° in diameter, lying in the zodiacal band.
1888 C. A. Young Text-bk. Gen. Astron. 347 There is said to be in it [sc. the zodiacal light] at the point exactly opposite to the sun a patch a few degrees in diameter of slightly brighter luminosity, called the ‘Gegenschein’ or ‘counter-glow’.
1901 H. H. Turner Mod. Astron. (1902) iv. 269
1968 Observer 22 Dec. 3/1 The astronauts..have a heavy programme of photography, including an attempt to photograph the ‘Gegenschein’, the image of the sun faintly reflected back from dust and tenuous gas in space.
1971 Nature 30 July 323/1 Observations of the gegenschein are made best away from the Milky Way in February, March and April.
This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2021).
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