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Jovian Planets

Jovian Planets. Jupiter in the IR and visible. Cassini 2000. Cassini. Chevrons. Discussion. Why do you think weather patterns on Jupiter can last for centuries, while those on Earth rarely last for more than a few days?. Comet Shoemaker-Levy 9 1993. Discussion.

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Jovian Planets

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  1. Jovian Planets

  2. Jupiter in the IR and visible

  3. Cassini 2000

  4. Cassini

  5. Chevrons

  6. Discussion Why do you think weather patterns on Jupiter can last for centuries, while those on Earth rarely last for more than a few days?

  7. Comet Shoemaker-Levy 9 1993

  8. Discussion What do you think caused all these comets to line up in this neat little row?

  9. Galileo pictures

  10. Discussion The clouds on Saturn are made of the same material as those on Jupiter, methane, ammonium and water. Why are Saturn’s clouds much blander looking than Jupiter’s if the composition of the clouds is so similar?

  11. Saturn’s atmosphere Hydrogen 97% Helium 3% Water 0.1% Methane 0.2% Ammonia 0.03%

  12. Saturn produces more internal Heat than Jupiter Even though Saturn is less massive and nearly as big as Jupiter, it produces 25% more heat per kg than Jupiter. Also Saturn’s atmosphere has only 3.3% He to Jupiter’s 13.6% although we think the overall composition of the two planets is about the same.

  13. Discussion Why do you think Saturn produces more heat per kg than Jupiter and why don’t we see the He in its atmosphere? Where could it have gone?

  14. Discussion Saturn’s winds have been clocked at 1100 mi/hr, much faster than Jupiter’s. How can you explain this given that Saturn is twice as far from the Sun as Jupiter.

  15. Discussion While weather patterns like Jupiter’s great red spot do appear on Saturn they tend to be short lived. Why do you think this is?

  16. Saturn’s tilt

  17. Galilean Moons

  18. Discussion From Earth the Galilean satellites appear only as points of light, yet before the space age astronomers were able to determine each of the satellites rotation rates and found that they are all in synchronous rotation. How could this be accomplished?

  19. Albedo Io 0.63 Europa 0.64 Ganymede 0.43 Callisto 0.17 Moon 0.11 Mercury 0.12 Mars 0.15

  20. Discussion What would you expect the result would be of exposing methane CH4 ice to ultraviolet light? Why do things in the outer solar system, composed largely of ices, often appear very dark?

  21. Discussion How did astronomers determine the size of the Galilean satellites before the Pioneer and Voyager flybys and HST?

  22. Sizes and mass km MMoon Io 3642 1.22 Europa 3120 0.63 Ganymede 5268 2.02 Callisto 4800 1.47 Moon 3476 1.00 Mercury 4880 4.49 Mars 6794 8.73

  23. Densities of the Galilean Satellites • Io 3.53 g/cm3 • Europa 3.02 g/cm3 • Ganymede 1.94 g/cm3 • Callisto 1.85 g/cm3

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