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This article explores the definition of planets, distinguishing them from other celestial bodies such as moons and asteroids. It defines a planet as a celestial body orbiting a star, highlighting certain criteria such as not being highly eccentric or crossing the path of another planet. Additionally, the article categorizes planets into two groups: major planets (like Earth and Jupiter) and dwarf planets (like Pluto and Ceres). Key characteristics such as orbital periods, diameters, masses, number of moons, and escape velocities for both major and dwarf planets are discussed.
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Planetary Data By. Kyle Wuest Evan Buette Michael Maher
Planet Definition • Planet: A celestial body orbiting a star; does not orbit a planet (like a moon); does not have a highly eccentric orbit; is isolated from space junk, asteroids, meteoroids, and comets; must not cross the path of another planet; does not shine on its own, but shines by reflecting light
What masses we call “Planets” • Earth • Mars • Jupiter • Saturn • Uranus • Neptune
What masses we call “Dwarf Planets” • Mercury • Venus • Pluto • Ceres • Eris • Huamea • Makemake