AS 101: MANY MOONS OF JOVIAN PLANETS – CH 11
What kind of moons orbit the Jovian planets?
Why do liquids matter in the cold outer solar system?
How are icy worlds different than rocky worlds?
Over 150 moons of Jovian planets have been discovered.
Tidally Locked = Gravity forces on side of a body to always face the other body.
[Ex: rotating around a planet and always facing it head on (not a rotation in
• Properties of moons:
Orbits, rotation, shapes
Formation and history, changes over time
Interior composition and heating, and geology
Atmospheric compositions and motions
• Types of moons:
Small, medium, large
> 1500 km diameter = 6 moons (geologically active today)
300-1500 km diameter = 15 moons (geologically active in past)
<300 km diameter = Lots of moons (not active)
• Planets and their moons:
Jupiter = 4 big moons, no medium-sized moons
Saturn = One big moon, many medium-sized moons
Uranus = No big moons, many medium moons
Neptune = One large moon (funny orbit) and one medium sized
II. Jupiter’s Moons:
The Galilean Moons
Europa: Tectonics, liquid water
Ganymede: Bigger than mercury
Callisto:Alot like terrestrial world (cratered)