| 单词 | galactic halo |
| 释义 | > as lemmasgalactic halo galactic halo n. a roughly spheroidal part of many spiral galaxies that surrounds the disc and the bulge and is more diffuse, containing stars that are older; spec. that of the galaxy to which the solar system belongs, which contains stars and globular clusters. ΚΠ 1938 Science 24 June 10/2 Our galaxy actually is surrounded by a thinly-populated spherical aura or halo of stars.] 1956 Astrophysical Jrnl. 123 492 A distribution [of radio sources] away from the galactic plane and almost uniformly around the galactic center in a sphere of a radius of the order of 10 kpc (the ‘galactic halo’). 1990 J. Gribbin & M. Rees Cosmic Coincidences viii. 219 The situation is complicated if the quasar light passes through several galactic haloes and has the chance to be lensed several times on its way to us. 2007 Nature 5 July 29/1 The oldest stars in our Galaxy lie in the galactic halo, the spherical ‘cloud’ of thinly scattered globular clusters and old stars surrounding it. < as lemmas |
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