Europa and Ganymede are moons of Jupiter.

Europa和Ganymede是木星的卫星。

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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。

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Special attention will be given to our sun and moon, as well as the moons of Jupiter and Saturn.

将重点讲解太阳和月亮，还有木星和土星的卫星。

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

VOA: special.2009.08.25

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

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