英语词汇“planetary ring”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

e. Astronomy. A flattened and very thin disc or band of material encircling Saturn in its equatorial plane, comprising ice particles and small quantities of rock dust and debris (now usually in plural). Also: a similar disc or band around any planet (also planetary ring).Saturn's ring system consists of several major rings separated by dark gaps, and it is now known to comprise thousands of narrow ringlets and many tiny moons (cf. ringlet n. 6). Narrow rings have also been identified around Jupiter, Uranus, and Neptune.crape ring: see the first element.

ΚΠ

1665 Philos. Trans. (Royal Soc.) 1 72 The first that have well observed this Shadow of Saturn's Body upon its Ring.

1721 N. Bailey Universal Etymol. Eng. Dict. Ansae, Anses, are the various positions of the ring of Saturn.

1802 J. Playfair Illustr. Huttonian Theory 508 If..the ring is a solid annulus..it may be so constituted that the attraction of Saturn..may produce a force perpendicular to its surface.

1865 R. A. Proctor Saturn & Syst. 115 The only possible interpretation of the stability of the Saturnian rings.

1921 Amer. Midland Naturalist 7 104 The amount of momentum which a planetary ring could possess should be directly proportional to the amount of material in that ring.

1986 Sci. Amer. Nov. 36/2 As the spacecraft rounded Uranus..it was eclipsed by the planet's rings and the planet itself, an event called an occultation.

1994 Discover Apr. 91/1 Planetary rings also provide a handy model for the protoplanetary disk that circled our sun.

2004 Time Out N.Y. 8 July 8/3 Saturn's rings contain tens if not hundreds of tiny moons and moonlets, whose gravitational perturbations help shape the rings.

单词	planetary ring
释义	> as lemmas planetary ring e. Astronomy. A flattened and very thin disc or band of material encircling Saturn in its equatorial plane, comprising ice particles and small quantities of rock dust and debris (now usually in plural). Also: a similar disc or band around any planet (also planetary ring).Saturn's ring system consists of several major rings separated by dark gaps, and it is now known to comprise thousands of narrow ringlets and many tiny moons (cf. ringlet n. 6). Narrow rings have also been identified around Jupiter, Uranus, and Neptune.crape ring: see the first element. ΚΠ 1665 Philos. Trans. (Royal Soc.) 1 72 The first that have well observed this Shadow of Saturn's Body upon its Ring. 1721 N. Bailey Universal Etymol. Eng. Dict. Ansae, Anses, are the various positions of the ring of Saturn. 1802 J. Playfair Illustr. Huttonian Theory 508 If..the ring is a solid annulus..it may be so constituted that the attraction of Saturn..may produce a force perpendicular to its surface. 1865 R. A. Proctor Saturn & Syst. 115 The only possible interpretation of the stability of the Saturnian rings. 1921 Amer. Midland Naturalist 7 104 The amount of momentum which a planetary ring could possess should be directly proportional to the amount of material in that ring. 1986 Sci. Amer. Nov. 36/2 As the spacecraft rounded Uranus..it was eclipsed by the planet's rings and the planet itself, an event called an occultation. 1994 Discover Apr. 91/1 Planetary rings also provide a handy model for the protoplanetary disk that circled our sun. 2004 Time Out N.Y. 8 July 8/3 Saturn's rings contain tens if not hundreds of tiny moons and moonlets, whose gravitational perturbations help shape the rings. extracted from ringn.¹ < as lemmas
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