oort cloud是什么意思_oort cloud的用法_词性_词根

双语例句

The Oort Cloud is thought to extend about 1 light year from the Sun.

欧特云团距太阳1光年距离。
The other six hail from the Oort Cloud more than 5, 000 times farther out.

其他六个产生于又远出5000多倍的奥尔特星云。
A Nasa graphic which illustrates how the Oort Cloud surrounds our solar system.

这幅美国宇航局的图示说明了奥特云如何包围着我们的太阳系。
This is still well within the Oort cloud, whose boundary is estimated to be beyond 50,000 AU.

据估计，奥尔特云的边界应在50,000天文单位外，因此该天体依然位于奥尔特云内。
Our solar system is surrounded by a vast collection of icy bodies called the Oort Cloud.

我们的太阳系被一大片冰体物质所包围，这就是所谓的欧特云团(Oort Cloud)。

释义

Astronomy a spherical cloud of small rocky and icy bodies postulated to orbit the sun beyond the orbit of Pluto and up to 1.5 light years from the sun, and to act as a reservoir of comets. Its existence was proposed by J.H. Oort.

【天文】奥尔特云（假定在离太阳1.5光年外冥王星轨道外面绕太阳转的由小岩粒和冰粒形成的作为彗星库的球形云团；荷兰天文学家J·H·奥尔特最先假设存在这种云）。