Our solar system is nearly five billion years old. It is made up of eight planets, a handful of “dwarf planets,” over 170 moons, dust, gas, asteroids, and comets all orbiting around the sun. Scientists estimate it formed around 4.6 billion years ago. For thousands of years humans were unaware of the Solar System and believed that Earth was at the center of the Universe. Astronomers such as Nicolaus Copernicus, Galileo Galilei, Johannes Kepler and Isaac Newton helped develop a new model of the universe that explained the movement of the planets with the Sun at the center of the Solar System.
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