We can see the moons of Jupiter through the use of the equipment known as telescope.
What is a Telescope?
This is referred to an optical instrument which makes far objects appear closer or nearer due to its lenses and mirrors.
Galileo used this instrument to study Jupiter and found out it had moon and inferred not everything in the sky revolves around the earth.
Read more about Jupiter here https://brainly.com/question/14586088
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