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Mercury
- Rockyiron.
- Largest iron core of anty planet.
- No atmosphere, rendering largest temperature range.
- Less than half the size of the Earth.
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Venus
- Rockyiron.
- Often called Earth's twin due to similarity in size and the fact that it's composed of the same elements.
- Thick atmosphere (*100 of Earth's), made of CO2
- Rich in sulfuric acid.
- Surface is intensely volcanic.
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Earth
- Rockyiron.
- Contains liquid water.
- Supports life.
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Mars
- Rockyiron.
- Small size causes less gravity.
- Atmosphere has been leaking.
- Contains ice caps.
- Has river valleys, evidence of liquid water.
- Cold and dry.
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Asteroid Belt
- Far away from each other as unpopularly believed.
- One asteroid, called Ida, has a moon called Dactyl.
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Jupiter
- Gas giant.
- Largest planet.
- Mosly atmospheric.
- Day lasts 10 hours.
- Rapid spin of Jupiter stratifies gases into bands.
- Massive storms and great red spot.
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Saturn
- Gas giant.
- Rings of ice.
- Day lasts 10.5 hours.
- Full of storms.
- Saturn's moon, Titan, is made of methane, an organic molecule.
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Uranus
- Gas giant.
- Considerable amounts of methane, giving it its blue color.
- Tilted 82 degrees toward the sun.
- Dark rings.
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Neptune
- Highest winds in the solar system.
- Storms occur, such as the Great Dust Spot.
- Width or rings are uneven.
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Pluto
- 2/3 size of the moon.
- Made of ice and rock.
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Comets
- Made of rock and ice.
- Solar wind caused by discharge of particles.
- Tail always points away from the sun.
- Oort Cloud Theory: Spherical cloud of comets surrounds the solar system.
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Moon
- Records history of the universe better than Earth.
- Used to be volcanic.
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