When was Jupiter discovered, and by whom?
by 
wickedwillie
ANSWERS: 3
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Since Jupiter is visible to the naked eye -- you don't need binoculars or a telescope to see it -- it has been visible in our sky since before there were humans on Earth. So, you can't really say anyone "discovered" Jupiter. However, you could ask: "Who first realized that Jupiter is a planet and not a star?" The farthest back in time we have recordings of Jupiter are from the Babylonians. And although they did not call it Jupiter (a name from the Romans), they did realize it had movements different from those of a star. So I vote for the Babylonians as the "discoverers" of Jupiter.
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Jupiter was discovered in 1610. It was discovered by Galileo.
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Jupiter was one of the five ancient "wandering stars" and was observed and watched by ancient humans before anyone developed writing. After the invention of the telescope, Galileo realized it was a planet and not a star ... in 1610.
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