Astronomy is the scientific study of celestial objects, such as stars, planets, galaxies, and other phenomena that originate outside the Earth's atmosphere. It is one of the oldest sciences, with records of astronomical observations dating back thousands of years. Here are some key points and concepts in astronomy: 1. Celestial Objects: Astronomers study various celestial objects, including stars, planets, moons, asteroids, comets, galaxies, and nebulae. Each of these objects has unique properties and plays a crucial role in understanding the universe. 2. Stars: Stars are enormous balls of hot gas that emit light and heat through nuclear fusion reactions in their cores.
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