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Lecture 10 Saturn
cambridge Lang
19
Astronomy
Undergraduate 1
10/26/2009

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Term
size
Definition
slightly smaller than jupiter
Term
density
Definition
low
Term
composition
Definition
hydgrogen mainly
Term
shape
Definition
largest equatorial bulge
Term
magnetism
Definition
global dipole field
axis aligned with rotation of planet
Term
weather
Definition
winds move one direction
faster than jupiter
giant white clouds of ammonia ice sometimes form
Term
interior
Definition
liquid + metal liquid hydgrogen

radiates its own energy due to helium rain
Term
rings
Definition
A, B, C
thin, flat
made of snowflakes and icebergs
inner rings move faster
innermost ring moves faster than planet
total mass = satellite mima's mass

D, F, G
dust
dcollapsing into saturn
f narrow hoop with shepherd satellites
Term
ring discoveries
Definition
huygens- thin, flat, detached 1659
maxwell- not solid 1867
Term
ring spokes
Definition
dark, defy graviation by moving at same speed no matter how far from sun, moved on saturn's magnetic field
Term
formation of rings
Definition
roche limit
meteors
Term
roche limit
Definition
gravitational radius around planet within which a satellite is captured

inside, big ones fall apart
Term
saturn's firends
Definition
titan satellite
enceladus satellite
iapetus
midsized moons of ice
Term
titan
Definition
nitrogen atmosphere
normal pressure
organic moleclues
very cold
methane rain
Term
enceladus
Definition
satellite
reflective ice surface
centers E ring
internal ocean of water ice/jets
Term
Iapetus
Definition
1 bright side 1 dark from huge reflective ring
Term
saturns moons
Definition
several ones of ice
co-ortibal, shpherd, largrangian (share orbit with larger moon)
Term
lagrangain moon
Definition
shares orbit with larger moon
Term
cassini division
Definition
between rings, contains ringlets
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