Scientist Galileo Galilei used the telescope to observe the stars and planets.
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What was the story of Scientist Galileo Galilei?</h3>
Galileo was a natural philosopher, astronomer, and mathematician who made major contributions to the creation of the scientific method and the disciplines of motion, astronomy, and strength of materials.
He also made ground-breaking telescopic discoveries, such as the discovery of Jupiter's four biggest moons.
Hence the correct option is A
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