英语词汇“comets, cloud of”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	comets, cloud of
释义	Comets, Cloud of Comets, Cloud of (Oort’s cloud of comets), a hypothetical invisible swarm of comets extending to the farthest reaches of the solar system (the aphelia of certain comets measure 50,-000–150,000 astronomical units), where the gravitational force of the sun is comparable in magnitude to the total gravitational field of the Milky Way Galaxy. The hypothesis was proposed by the Dutch astronomer J. Oort in 1950. Perturbations caused by the stars nearest to the sun change the orbits of members of the cloud of comets, carrying some of them into orbits with perihelia near the sun. Under these conditions the comets can be observed.
随便看	moscow school of social and economic sciences moscow silk combine moscow society of history and russian antiquities moscow society of naturalists moip moscow soviet of workers deputies moscow stanislavsky dramatic theater moscow state academy of applied biotechnology moscow state building university moscow state conference of 1917 moscow state conservatoire moscow state conservatory moscow state forest university moscow state geological prospecting academy moscow state industrial university moscow state institute for international relations moscow state institute of business administration moscow state institute of electronic engineering moscow state institute of electronics and mathematics moscow state institute of electronic technology moscow state institute of international relations moscow state institute of steel and alloys moscow state linguistic university moscow state medico-stomatological university moscow state mining university moscow state open university

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Comets, Cloud of

Comets, Cloud of