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Tour of the Outer Planets. Our first stop… Jupiter!. Largest planet in the solar system 63 named moons (don’t worry, you only have to learn four! 11 times the diameter of Earth 5 AU from the Sun What is the surface like? Can we land there?. Great Red Spot. Giant storm
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Our first stop… Jupiter! • Largest planet in the solar system • 63 named moons (don’t worry, you only have to learn four! • 11 times the diameter of Earth • 5 AU from the Sun What is the surface like? Can we land there?
Great Red Spot • Giant storm • New spot appeared and then disappeared days later
Jupiter’s moons (Galilean moons) • Ganymede • Largest moon in the solar system • Larger than Mercury! • Has ice! • Has a magnetosphere • Very thin oxygen atmosphere!
Callisto-2nd largest Galilean moon • Same size as Mercury • May have subsurface liquid ocean • Could hold life in ocean ??
Io- 3rd largest Galilean moon • 400 active SO2 volcanoes due to tidal activity with Jupiter • Some are taller than Everest • Rock coated with sulfur dioxide frost
Europa-last, but most important • Smaller than the Moon • Surface composed of 100 km thick ice layer • Liquid ocean underneath • Thin O2 • Life, microbes?
Next Stop… Saturn! • 10 times the diameter of Earth • 10 AU from Earth • 56 moons (you only need to know ONE! • Storms on surface
Titan is the largest moon of Saturn (1.5 times our Moon) • Made of ice and rock • Air is nitrogen and methane • Possible microbial life?
Uranus!! Ice Giant • 4 times Earth’s diameter • 19 AU away • More methane, ammonia than Jupiter • 27 moons
Sideways rotation • 42 years of darkness/light • Rings less visible than Saturn (rock vs. ice)
Ice Giant: Neptune! • Close in size and composition to Uranus • Methane gives it the blue color • Four faint rings • Great Dark Spot • 30 AU from the Sun • Moon, Triton, revolves in retrograde • 13 moons
Dwarf Planets • Ceres (in the asteroid belt) about 3 A.U. • Probe will arrive in 2015
Pluto (Charon) • Two objects in binary revolution • 40 AU from the Sun • Orbit angled differently than Earth • Crosses Neptunes orbit 20 out of 248 years
Eres • Other TNOs
Comets • Small collections of ice, dust, and rock that orbit the sun • Some originate in the Kuiper belt, others from the Oort cloud