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This video gives a brief introduction to the planets of our solar system. The two categories of planets (terrestrial and jovian) are discussed. The spacing of the orbits of planets is illustrated. Photos of the planets are shown. The video explains how the masses, distance to the planets, and diameters of the planets are determined. The video shows some properties of the planets ... density, number of moons, atmospheric pressure, magnetic field, etc. This video relates to Chapter 9 of astronomynotes.com. PHY121 SCIE1300 Prof. Greg Clements