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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