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Eyes on the Sky - The Solar System (Eyes on the Sky)
Eyes on the Sky The Solar System - Eyes on the Sky Author:Don Nardo This informative volume explains how the sun and its family of planets, moons, asteroids, and comets formed, how all are held together by mutual gravitational attractions, and how they move as a unit through the dark gulfs of space, journeying around the center of our galaxy once every 200 million years. (20031201)