While the moons' rapid rotation would be enough to squash them into a smooth oval, it can't explain the rim around the centre of the saucer shape.

虽然卫星的快速旋转足以将它们挤压成一个光滑的椭圆形，但它无法解释碟形中心的边缘。

youdao

They could look at the spectra of the light the moons reflected.

他们可以观察月亮反射的光的光谱。

youdao

Using it, he first observed the moon in the fall of 1609, then the moons of Jupiter, and sunspots.

1609年夏天，伽利略曾第一次用它观察了月球，之后他还观察到了木星的卫星和太阳黑子。

youdao

It's what we'd use to go to, eventually,to Mars or to the moons of Mars."

VOA: special.2009.12.30

These mechanical devices that show the relative placement and movement of the planets and moons are sometimes called orreries.

VOA: special.2010.09.29

At first,he thought it was the shadow of one of Jupiter's four big moons.

VOA: special.2009.08.25

By tradition, the moons of Pluto have names associated with Hades and the underworld.

ENGADGET: Pluto moon names to be selected by public voting, we talk to astronomer Mark Showalter

Galilei discovered the moons of Jupiter in, mebbe 1608, 1610, something like that.

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In some of the most breathtaking pictures from Cassini we can actually watch the moons at work.

BBC: Saturn's beauty and power