Answer: In 1610, Galileo used his new spyglass (telescope) to observe Jupiter, and found that it had four moons go- ing around it. These were the first moons found around another world, and the first bodies indisputably orbiting something besides the Earth.
Explanation:
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Galileo was an Italian astronomer who found out about different things in space such as the mountains of the moon, the moon of Jupiter, and the phases of Venus.
Galileo in the year 1610 observed the existence of Jupiter through his telescope or spyglass made by him at home. He found about four moons that are revolving around Jupiter constantly that look like stars.
Therefore, he concluded that there are other bodies as well that is moving in their orbit like Earth.
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