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Characteristics of Planets The Sun Million times bigger than Earth Gravity pulls planets toward the sun A big star Yellow Ball of gas Heats planets Center of the solar system Venus Inner planet Same size as Earth Second planet from the sun Closest to Earth Clouds swirl fast Strong winds High temperatures Carbon dioxide gas around atmosphere No living things Mars Inner planet Volcanoes, canyons Has seasons Many craters Atmosphere is carbon dioxide Red planet forms red dust in the air 2 moons Possible living things Mercury Inner planet Closest planet to the sun Second smallest planet No living things No water Hard to see with telescope Earth Inner planet Living things Third planet from the sun More water than land One moon Rotates once every 24 hours 365 days to revolve around the sun Jupiter First outer planet Largest planet Very cold on outside, hotter on inside No living things Spins fast on axis Great Red Spot (maybe a giant hurricane) Has rings 17 or more moons Saturn Outer planet Second largest planet Cold planet Made of gases Looks yellow Has rings At least 22 moons No living things Uranus Outer planet 7th planet from the sun Fuzzy and blue No living things At least 15 moons Rings that are hard to see Neptune Farthest away from the sun Very cold 2 rings 6 or more moons Large planet Pluto Very small planet May have been a moon of Neptune’s 1 moon named Charon Sometimes farthest planet from the sun