“Oort cloud”的概念、定义、翻译、参考文献-科学参考

Oort cloud

Physics

A cloud of comets around the sun a long way beyond the orbit of Pluto, extending to about half the distance to the nearest star. It consists of large numbers of objects and is the source of long-period comets. The Oort cloud can be regarded as ‘rubble’ left over from the formation of the solar system. It is named after the Dutch astrophysicist Jan Hendrik Oort (1900–92), who discussed it in 1950.

Space Exploration

A spherical cloud of comets beyond Pluto, extending out to about 100 000 astronomical units (approximately one light year) from the Sun. The gravitational effect of passing stars and the rest of our Galaxy disturbs comets from the cloud so that they fall in towards the Sun on highly elongated orbits, becoming visible from Earth. As many as 10 trillion comets may reside in the Oort cloud, named after Dutch astronomer Jan Oort, who postulated its existence in 1950.

Geology and Earth Sciences

A spherical zone surrounding, but gravitationally bound to the solar system, at distances between 20 000 and 100 000 AU from the Sun, which contains about 10¹² comets. Its existence was first proposed in 1950 by the Dutch astronomer, Jan Hendrik Oort (1900–92). Gravitational perturbations by passing stars or molecular clouds result in comets acquiring orbits within the orbit of Jupiter.

单词	Oort cloud
释义	Oort cloud Physics A cloud of comets around the sun a long way beyond the orbit of Pluto, extending to about half the distance to the nearest star. It consists of large numbers of objects and is the source of long-period comets. The Oort cloud can be regarded as ‘rubble’ left over from the formation of the solar system. It is named after the Dutch astrophysicist Jan Hendrik Oort (1900–92), who discussed it in 1950. Space Exploration A spherical cloud of comets beyond Pluto, extending out to about 100 000 astronomical units (approximately one light year) from the Sun. The gravitational effect of passing stars and the rest of our Galaxy disturbs comets from the cloud so that they fall in towards the Sun on highly elongated orbits, becoming visible from Earth. As many as 10 trillion comets may reside in the Oort cloud, named after Dutch astronomer Jan Oort, who postulated its existence in 1950. Geology and Earth Sciences A spherical zone surrounding, but gravitationally bound to the solar system, at distances between 20 000 and 100 000 AU from the Sun, which contains about 10¹² comets. Its existence was first proposed in 1950 by the Dutch astronomer, Jan Hendrik Oort (1900–92). Gravitational perturbations by passing stars or molecular clouds result in comets acquiring orbits within the orbit of Jupiter.
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