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The Inner Planets

The Inner Planets. Please record the information on your information sheets……. Shared Characteristics. Rocky and cratered surface Smaller than the outer planets Orbits bring them close to the Sun Have no (or few!) moons. Mercury. 0.39 Au from the Sun 1/3 diameter of Earth

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The Inner Planets

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  1. The Inner Planets Please record the information on your information sheets……..

  2. Shared Characteristics • Rocky and cratered surface • Smaller than the outer planets • Orbits bring them close to the Sun • Have no (or few!) moons

  3. Mercury • 0.39 Au from the Sun • 1/3 diameter of Earth • -184 to 427° C • 59 days for one rotation • 88 days to orbit the Sun • 0 moons • Almost NO atmosphere • Features: lots of craters

  4. Venus • 0.72 Au from the Sun • almost the same as Earth • 457° C • 243 days for one rotation • 226 days to orbit Sun • 0 moons • Lots of carbon in atmosphere • Has mountains, valleys and volcanoes and rains sulfuric acid

  5. Earth • 1.0 AU from the Sun • 12 756 km diameter • -89 to 58° C • 23h 56 min to rotate once • 365 days 5 hours to rotate about the Sun • 1 moon • Atmosphere: 78% Nitrogen, 20% Oxygen, 2% other gases • Water, breathable air and YES! LIFE!

  6. Mars • 1.5 AU • ½ diameter of Earth • -140 to 20° C • 24.6 hours to rotate once • 1.88 years to orbit the Sun • 2 moons • Atmosphere: carbon dioxide and a little oxygen • Rust in soil, methane in atmosphere, tallest volcano in solar system

  7. Outer Planets

  8. What they have in common • Gassy atmosphere with no solid surface • Very large when compared to inner planets • Orbit far from the Sun • Have rings • Have a lot of moons

  9. Jupiter • 5.2 AU from the Sun • 12 x size of Earth • -150° C • 9.8 hours for one rotation • 12 years for one orbit • 63 moons • Atmosphere: mostly hydrogen and helium • Great red spot has high pressure and could crush bones, has small ring system

  10. Saturn • 9.5 AU from the Sun • 10 x size of Earth • -170° C • 10.7 hours for one rotation • 29.5 years for one orbit • 61 moons • Atmosphere: mostly hydrogen and helium • Great white spot (storm) and low density (could float on ocean on Earth)

  11. Uranus • 19 AU from the Sun • 4 x size of Earth • -215° C • 12.2 hours for one rotation • 84 years for one orbit • 27 moons • Atmosphere: mostly hydrogen and helium • Rotates sideways

  12. Neptune • 30 AU from the Sun • 4 x size of Earth • -235° C • 16.1 hours for one rotation • 165 years for one orbit • 13 moons • Atmosphere: mostly hydrogen and helium • Great dark spot

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