Jupiter
/ˈdʒuːpɪtə(r)/1
2
- Astronomy the largest planet in the solar system, a gas giant which is the fifth in order from the sun and one of the brightest objects in the night sky【天文】木星（太阳系中最大的行星, 为一气态巨星, 是从太阳向外数的第五颗巨星, 为夜空中最明亮的星体之一）。
Jupiter orbits between Mars and Saturn at an average distance of 778 million km from the sun. Although it has an equatorial diameter of 142,800 km the planet rotates in less than ten hours. Its upper atmosphere consists mainly of hydrogen with swirling clouds of ammonia and methane, with a circulation system that results in a number of distinct latitudinal bands. There are at least sixteen satellites, four of which (the Galilean moons) are visible through binoculars, and a faint ring system.