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Transcript
Solar System The sun • The sun’s mass is 99.8% of all the mass in the solar system. • The sun is a ball of glowing gas that is about ¾ hydrogen and ¼ helium. The Sun • Although the Sun looks very large in our sky, it is an average size star. • There are many stars larger than the Sun, but the Sun looks much bigger because it is so much closer to Earth. • The Sun is at the center of our solar system and is the only star in our solar system. How big is the Earth? INNER PLANETS • Small • Rocky Surface • Called “Terrestrial” Planets • Solid • No rings • Short Revolution OUTER PLANETS • No solid surfaces • Called “Gas Giants” • Might have partly solid core • Have lots of moons and satellites • Long revolution • Have rings
