They didn't "know where to discover" Jupiter. Jupiter has been known since ancient times, since before there was astronomy. Jupiter is one of the brightest objects in the night sky, and can be easily spotted without visual aid. Jupiter along with four other planets: Mercury, Venus, Mars, and Saturn, were given special recognition by some of the earliest obseervers of the night sky because they moved relative to the background of stars.
2019
It was observed by Babylonian astronomers in the 7th or 8th century BC.
Jupiter can be seen with the naked eye, so it has been observed as far back as the Babylonian astronomers of the 7th or 8th century B.C.
Copernicus dis not discover that Jupiter was a planet. It was always known to be a planet, though for the longest time we did not know what a planet was.
Astronomers believed that it was named after the Roman god Jupiter.
Jupiter is plainly visible, as it is one of the brightest objects in the night sky. Only Venus and the moon are brighter. Thousands of years ago, early astronomers notices that Jupiter, along with Mercury, Venus, Mars, and Saturn moved relative to the background of stars.
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Jupiter was known to ancient astronomers. One of its moons was observed in 362 BC.
A telescope.
because the planet jupiter is the biggest planet in our solar system and the word jupiter means supreme god
people discovered that Jupiter is not the worst planet
Galileo did NOT discover Jupiter; just Jupiter's 4 largest moons.