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Unformatted text preview: Our sun is just one of 70 thousand million million million ← When stars form they are surrounded by a rotating disk of cosmic debris ← Gravity pulls debris together to form planets that revolve in a consistent direction around the star ← Sun= 99.8% of total mass of our solar system ← Terrestrial Planets (Mercury, Venus, Earth, Mars) • Composed of rocks • Divided into compositional layers o Crust- lighter elements o Mantle o Core- heavier elements ← Jovian Planets (Jupiter, Saturn, Uranus, Neptune) ← Large, gas giants ← Characterized my many moons and ring systems ← The Earth is tilted 23.5 degrees ← 23/01/2008 16:58:00 ← 23/01/2008 16:58:00 ←...
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- Spring '08
- Solar System, Planet, Big Bang