Jupiter, Jupiter Information, Facts, News, Photos — National Geographic

The most massive planet in our solar system, with four planet-size moons and many smaller satellites, Jupiter forms a kind of miniature solar system. Jupiter resembles a star in composition. In fact, if it had been about eighty times more massive, it would have become a star rather than a planet.

On January 7, 1610, using his primitive telescope, astronomer Galileo Galilei saw four small “stars” near Jupiter. He had discovered Jupiter’s four largest moons, now called Io, Europa, Ganymede, and Callisto. Collectively, these four moons are known today as the Galilean satellites.

About dmacc502

Happy individual with positive outlook. Enjoy people and sharing ideas and mindful thoughts. Avid news watcher, cat lover, birdwatcher and cook.Fortunate not to have to work and love my quiet time. Married with two daughters in college.
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