Pluto - dwarf planet, inner planets - more dense/rocky, outer planets - fast rotation, Mars - 4th planet, nitrogen - 78% of atmosphere, oxygen - 21% of atmosphere, asteroid belt - between Mars/Jupiter, Sun - medium size yellow star, seasons - due to Earths tilt, revolution - equal to one year, rotation - equal to one day, tides - Caused by Moons pull, spring tide - VERY high and low tides, neap tide - no change in tide, Oort cloud - Where comets originate, meteor - same as shooting star, hydrogen - Sun is made of,

Solar system!

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