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单词 outer planet
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outer planet
outer planet n. (a) any of the planets Jupiter, Saturn, Uranus, Neptune, and Pluto, lying beyond the asteroid belt; (b) any of the superior planets (rare).
ΚΠ
1850 A. C. Lowell Elements Astron. 78 Since the day of the outer planets is much shorter than ours, its year contains many more of its own days than it would of ours. Jupiter's year contains 10,000 of his own days. Saturn's years 30,000 of his days.
1930 H. T. Stetson Man & Stars iv. 31 Not only did the heliocentric hypothesis solve the problem of retrograde motion for the outer planets, but it was equally capable of explaining the retrograde motion of the inferior planets, Venus and Mercury.
2001 Nature 24 May 423/1 The idea of a belt of icy bodies surrounding the outer planets goes back to 1930, soon after the discovery of Pluto.
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更新时间:2024/11/10 23:39:11