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When Did Galileo Discovered

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Galileo Galilei was born in 1564 in Pisa, Italy. He made his discovery of the solar system after he built his very own telescope. He learned that the moon is not smooth but has craters and valleys. He discovered that Jupiter had moons. Galileo did nothing to go against the church's beliefs. Galileo made many discoveries in his lifetime. One of the many things Galileo discovered was that the moon is not soft and smooth. In fact the moon has craters and valleys like Earth. He also found out that the heliocentric theory is true. When he was looking into the night sky he saw Venus and saw that it has phases just like the moon. The moon circles the Earth, so that means that Venus circles the sun just like the rest of the planets. All of these discoveries
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