The Inner and Outer Planets

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The Inner and Outer Planets

• Chapter 19 Section 2

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The Inner Planets

• Terrestrial
• High temperatures
• Closer to the Sun
• Closer to each other

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Mercury

• Closest to the Sun
• Only 88 days to orbit
• Many craters
• Temperature extremes
• 400C during day, -180 at night
• Basically no atmosphere

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Venus

• Earths sister planet
• Morning and evening star
• Thick atmosphere of CO2 and Sulfur
• Longer day than year
• Spins opposite than other planets
• Over 500C all the time

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Earth

• Home sweet home
• Only planet with sustained life
• Hydrosphere (water)
• Atmosphere made up of N, O, CO2
• Comfy temps

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Mars

• Frozen polar CO2 caps
• Smaller than Earth
• Slightly longer day and year
• Very cold
• Largest mountain in solar system
• Olympus Mons
• Thin atmosphere

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Asteroid Belt

• Separates the inner and outer planets
• Possibly an annihilated planet
• Most asteroids hang out here

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Outer Planets

• Gas giants
• No solid surface, just thick atmosphere
• All very large
• Very far apart from each other
• All have rings

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Jupiter

• Could hold 1300 Earths
• Almost big enough to be a star
• 12 EY 1 Jovian year
• 1 Jovian day 12 EH
• Huge storms
• Great red spot hurricane larger than Earth
• Some moons may have water

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Saturn

• 29 years to orbit
• Large rings made of ice and dust
• 10 hour day
• Possibly still forming
• Tilts itself

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Uranus

• Blue in color due to methane gas
• 84 years to orbit
• Rotates sideways
• Very cold
• -250C

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Neptune

• Methane atomosphere
• 164 years to orbit
• -250c temps
• 30 times farther from the sun than Earth

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Pluto
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Assignment 10

• Pg 645 1-10