| 释义 |
Gegenschein, gegenschein Astr.|ˈgeɪgənʃaɪn|
[G., f. 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 c 1803, published in his Kosmos (1845) I. 144.]
A patch of very faint nebulous light occurring in the ecliptic opposite the sun.
1880Amer. Jrnl. Sci. CXX. 442 The gegenschein is an extremely faint spot of light some 7° in diameter, lying in the zodiacal band. 1888[see counter-glow]. 1968Observer 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. 1971Nature 30 July 323/1 Observations of the gegenschein are made best away from the Milky Way in February, March and April. |