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单词 minor planet
释义

minor planetn.

Brit. /ˌmʌɪnə ˈplanɪt/, U.S. /ˌmaɪnər ˈplænət/
Origin: Formed within English, by compounding. Etymons: minor adj., planet n.
Etymology: < minor adj. + planet n.
Astronomy.
An asteroid; (originally) spec. each of the four largest and earliest known asteroids, Ceres, Pallas, Juno, and Vesta. In early use also: †each of the smaller principal planets, i.e. Mercury, Venus, Earth, and Mars (obsolete). Cf. major planet n. at major adj. and n.1 Compounds.
ΘΚΠ
the world > the universe > planet > primary planet > minor planet or asteroid > [noun]
asteroid1802
cometoid1803
planetoid1803
minor planet1823
dwarf planet1839
worldlet1841
1823 S. Groombridge in Philos. Mag. 61 459 (heading) Apparent Places of the four Minor Planets at and about the Time of their ensuing Opposition... Pallas..Vesta..Ceres..Juno.
1846 D. Lardner Pop. Lect. Sci. & Art I. 237 Passing across the wide space which intervenes between the minor planets which, with the earth, circulate under the immediate wing of the sun, [etc.].
1867 G. F. Chambers Descr. Astron. Voc. 798 Egress..is the passing off, after a transit of, a minor planet from the disc of the Sun or of a satellite from the disc of its primary.
1956 F. G. Watson Between Planets (rev. ed.) ii. 11 Thousands of minor planets move around the sun, principally in the region between the orbits of Mars and Jupiter.
1974 R. H. Stoy Everyman's Astron. vi. 203 The apparent brightness of any minor planet varies inversely both as the square of its distance from the Earth and as the square of its distance from the Sun.
1991 C. A. Ronan Nat. Hist. Universe 102/2 Planetoid material that did not coalesce into larger units formed the asteroids or minor planets.
This entry has been updated (OED Third Edition, March 2002; most recently modified version published online March 2022).
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