The Origin of the Solar System

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4 Terms

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Solar System

A star system consisting of the Sun and the celestial bodies that orbit it, including the eight planets, their moons, dwarf planets, asteroids, comets, and other icy bodies, held in place by the Sun's gravity.

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Geocentric Model

Earth-centered model of the solar system; proposed by Claudius Ptolemy; shows Earth at the center with the Sun, Moon, and planets orbiting it.

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Heliocentric Model

Sun-centered model of the solar system; proposed by Nicolaus Copernicus; planets orbit the Sun.

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Nebular Hypothesis

Theory that the solar system formed from a contracting, rotating solar nebula that flattened into a disk and led to Sun and planets through condensation and accretion