For 76 years, Pluto was considered our solar system's ninth planet. So what caused it to lose its planetary status? Find out on this episode of "Space, Down to Earth"! 🌌🌎 | In The Know Innovation
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For 76 years, Pluto was considered our solar system's ninth planet. So what caused it to lose its planetary status? Find out on this episode of "Space, Down to Earth"! 🌌🌎 | In The Know Innovation
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Pluto was reclassified from a planet to a "dwarf planet" in 2006 by the International Astronomical Union (IAU). This decision was based on a new definition of what constitutes a planet. According to the IAU, a celestial body must meet three criteria to be considered a planet: 1. It must orbit the Sun. 2. It must be spherical in shape, due to its own gravity. 3. It must have "cleared the neighborhood" around its orbit, meaning it is gravitationally dominant and has removed most other objects in i
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