Chapter 8 Jovian planet systems
8.1 A different kind of planet
What are jovian planets made of?
General compositions of jovian planets
- The jovian planets are made mostly of hydrogen, helium and hydrogen compounds
Jupiter and Saturn less hydrogen compounds and less rock and metal
Neptune and Uranus contain less hydrogen and helium
Gas capture in the solar nebula
- The jovian planets nearer to the sun captured more hydrogen and helium gas making
them larger and leaving them with smaller proportions of hydrogen compounds, rock and
metal (Jupiter and Saturn)
What are jovian planets like on the inside?
- If you plunged below jupiters clouds, you would never encounter a solid surface
1.) Visible clouds
2.) Gaseous hydrogen
3.) Liquid hydrogen
4.) Metallic hydrogen
What is the weather like on jovian planets?
- All the jovian plants have cloudy skies but clouds of different kinds form at different
altitudes in each planets atmosphere
Global winds and storms
- The rapid rotation of jovian planets helps drive strong winds creating their banded
appearances and sometimes giving rise to huge storms
Jupiter’s red spot is a gigantic storm
8.2 A wealth of worlds: Satellites of Ice and Rock
What kind of moons orbit the jovian planets?
- 160 moons orbiting the planets - Jupiter has 60 moons
- A few jovian moons rival the smallest planets in size and geological interest while vast
numbers of smaller moons are captured asteroids and comets
- Ganymede is jupiters largest moon
Why are Jupiter’s Galilean moons geologically active?
Io: the most volcanically active world in t