More notes at http://tanguay.info/learntracker
C O U R S E 
Moons of Our Solar System
David Rothery, The Open University
C O U R S E   L E C T U R E 
The Icy Moons
Notes taken on November 4, 2016 by Edward Tanguay
as you get to Jupiter and beyond, you get to the frost line
bodies are icier than rocky
the moons of Jupiter and the moons further out tend to have more ice on their surfaces and interiors
how ice fractures is different than it fractures on earth
icy moons
a group of small bodies
orbit the giant gas planets
also in the Kuiper Belt there are icy bodies
1000 kilometers across or smaller
generally composed of 50% or more of water ice
a mix of ices
mostly water ice
low-temperature melting materials
carbon dioxide
carbon monoxide
orbits Neptune
nitrogen gas is so cold it freezes on the surface
the moons are so interesting because they have this water ice
Europa (Jupiter), Ganymede (Jupiter), Callisto (Jupiter), Titan (Saturn), Triton (Neptune)
interior temperatures are warm enough that it will actually melt those ices
spacecraft that have gone to these bodies have detected the magnetic signature of water oceans that lie deep in the interior
Europa (Jupiter)
ocean lies on top of a silicate rocky core
liquid is where life could exist
not a lot of sunlight there
life would have to rely on chemical energy
could be bacterial life
the largest moon in the solar system
the third moon out from Jupiter
parts of its surface appear old and parts appear young
it has its own magnetic field
generated possibly by a liquid core inside the moon
only two other bodies have that kind of magnetosphere: the Earth and Mercury
for an icy moon to have one is still a bit of a puzzle