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SOLAR SYSTEM and MILKYWAY GALAXY

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  The solar system is the collection of planets, asteroids, comets, and other celestial bodies that orbit around the sun. It is located in the Milky Way galaxy and is estimated to be around 4.6 billion years old. The solar system is home to eight planets, with Earth being the third planet from the sun. Each planet has its own unique characteristics, and the study of the solar system has helped scientists to better understand the formation and evolution of the universe. PLANETS: The eight planets of the solar system are divided into two groups: the inner planets and the outer planets. The inner planets, also known as the terrestrial planets, include Mercury, Venus, Earth, and Mars. These planets are relatively small and dense and have rocky surfaces. They are also located close to the sun and have shorter orbital periods than the outer planets. The outer planets, also known as the gas giants, include Jupiter, Saturn, Uranus, and Neptune. These planets are much larger than the inner plan
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  The Milky Way galaxy is the spiral galaxy that contains our solar system. It is estimated to be around 100,000 light-years in diameter and contains hundreds of billions of stars, planets, and other celestial objects. The Milky Way is one of the largest and most studied galaxies in the observable universe, and its study has helped scientists to better understand the structure and evolution of galaxies. The Milky Way is composed of several distinct regions, including a central bulge, a disk, and a halo. The central bulge is a dense, spherical region at the center of the galaxy that is composed of older stars. The disk is a flattened region that contains the spiral arms of the galaxy and is home to most of the galaxy's younger stars. The halo is a spherical region that surrounds the disk and bulge and is composed of older stars and globular clusters. The spiral arms of the Milky Way are regions of higher density where stars are more densely packed together. These arms are composed o
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