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How big is this spider? How big is Earth? Our Solar System Scale Size of Terrestrial Planets Scale Size of All Planets Scale Size of Solar System Sizing up our Solar System Which star is our Sun? 1 2 3 4 What happened to Pluto?! What makes a planet a planet? A Celestial body that: • Is in orbit around the Sun • Has enough gravity to be nearly spherical • Has dominated the area around its orbit Other Objects in our Solar System… Vesta • Asteroids • Moons Ida (has its own moon) Other Objects in our Solar System… • Comets • Meteors
