Mercury, no atmosphere, Venus, thick atmosphere, dense atmosphere, Carbon Dioxide and Sulfur present, Known as Earth's Sister due to size, Earth, Habitable (livable), has water in all 3 states (solid, liquid, gas), perfect distance from sun for life., Nitrogen, Oxygen, Carbon Dioxide Atmosphere, Mars, Thin atmosphere, carbon dioxide atmosphere, COLD planet & next target for exploration, Oxidation on surface (rust!), Asteroid Belt, Found between Mars and Jupiter, Kuiper Belt, Found beyond Pluto (icy cold area of space!).

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