Nicolaus Copernicus studied the Sun, Moon, and planets., Galileo Galilei used a telescope to observe Jupiter’s moons., “The Earth moves around the Sun,” explained Copernicus., In 1609, Galileo carefully recorded the movement of Venus., Johannes Kepler discovered that planets travel in oval-shaped orbits., After many years of study, scientists understood that the solar system is always moving., At the observatory in Poland, Copernicus wrote detailed notes about the planets and stars., “If Earth is moving,” asked Galileo, “why do people not feel it spinning through space?”, During the Scientific Revolution, astronomers in Italy, Germany, and England shared new ideas about the solar system’s motion., Although many people once believed that the Sun orbited Earth, discoveries by Copernicus, Kepler, and Galileo gradually changed the world’s understanding of space.

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