单词 | asteroid zone |
释义 | > as lemmasasteroid zone asteroid zone n. the region of space encircling the sun between the orbits of Mars and Jupiter, in which the majority of the solar system's asteroids have their orbits; cf. asteroid belt n.In quot. 1866 with reference to an early theory of solar system formation (now discredited), which hypothesized that the main asteroid belt is made up of fragments of a planet which once occupied this region. ΚΠ 1866 Amer. Ann. Cycl. 1865 95/1 Humbolt had called attention to some remarkable differences between the planets lying without and those within the ‘asteroid planet’, or asteroid zone. 1922 H. S. Jones Gen. Astron. x. 245 The asteroid zone extends from Mars to Jupiter. 2007 ABC Transcripts (Austral.) (Nexis) 28 Sept. [NASA] launched a spacecraft on a five billion kilometre journey to the asteroid zone between Mars and Jupiter. < as lemmas |
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