1610 - Galileo Galilei observes the four largest moons of Jupiter for the first time. He named them and in turn the four are called the Galilean moons.

1610年的今天，伽俐略·伽俐雷首次发现了木星的四大卫星。他依次将四颗卫星命名为伽俐略卫星。

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This' family portrait, 'a composite of the Jovian system, includes the edge of Jupiter with its Great Red Spot, and Jupiter's four largest moons, known as the Galilean satellites.

这是一张木星'全家福'的照片，它包括了木星系统的各个组成部分：木星的边缘边的红斑，和木星的称为伽利略卫星的4颗最大的卫星。

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The U. S. space agency released a picture Tuesday showing Jupiter surrounded by three of its four largest moons — Io, Europa and Ganymeade.

美国航天局星期二公布的第一张照片显示了木星四颗最大卫星中的三颗卫星，分别是埃欧、欧罗巴和盖尼米德。

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