Bit of Administration ….Bit of Administration ….• ReadingReading

– BSNV Chap. 12BSNV Chap. 12

• Homework 9Homework 9– Due Friday, April 23, in box by Mathieu office door (6522) SterlingDue Friday, April 23, in box by Mathieu office door (6522) Sterling

• PortfoliosPortfolios– Due Wednesday, April 28Due Wednesday, April 28– Can turn in each one any time for quick turnaround on gradeCan turn in each one any time for quick turnaround on grade

• Lab 3Lab 3– Due Wednesday, April 28Due Wednesday, April 28– Problem 5, HW 1 is a good starting point for the lab questionsProblem 5, HW 1 is a good starting point for the lab questions– Note typo in Question 3 - “Jupiter” => “Saturn”Note typo in Question 3 - “Jupiter” => “Saturn”

Jovian PlanetsJovian Planets

•Jovian WeatherJovian Weather

QuickTime™ and aYUV420 codec decompressorare needed to see this picture.

Jovian PlanetsJovian Planets•Jovian WeatherJovian Weather

Jupiter emits 2x the energy it receives from the Sun!Jupiter emits 2x the energy it receives from the Sun!

Infrared VisibleInfrared Visible

Jovian PlanetsJovian Planets

• (Jovian) Weather Patterns(Jovian) Weather Patterns

•Essential Idea - Essential Idea - Atmosphere made up of high- and low-pressure systemsAtmosphere made up of high- and low-pressure systems High - Bulges in atmosphereHigh - Bulges in atmosphere Low - Depressions in atmosphereLow - Depressions in atmosphere

Jovian PlanetsJovian Planets

• (Jovian) Weather Patterns(Jovian) Weather Patterns

HighHigh

LowLow

Jovian PlanetsJovian Planets

• (Jovian) Weather Patterns(Jovian) Weather Patterns

•Essential Idea - Essential Idea - Atmosphere made up of high- and low-pressure systemsAtmosphere made up of high- and low-pressure systems High - Bulges in atmosphereHigh - Bulges in atmosphere Low - Depressions in atmosphereLow - Depressions in atmosphere

Atmosphere flows from high to lowAtmosphere flows from high to low

Jovian PlanetsJovian Planets

• (Jovian) Weather Patterns(Jovian) Weather Patterns

• Essential Idea - Coriolis EffectEssential Idea - Coriolis Effect

NN

L

L

H

H

N

S

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Why does the ball travel in a circle and come back to him? Why does the ball travel in a circle and come back to him?

A) Gravity provides a central force.A) Gravity provides a central force. B) The merry-go-round puts a sideways spin on it.B) The merry-go-round puts a sideways spin on it. C) The merry-go-round goes half-way around during the ball’sC) The merry-go-round goes half-way around during the ball’s travel.travel. D) The merry-go-round is sloped, and higher in the center.D) The merry-go-round is sloped, and higher in the center.

ConcepTest!ConcepTest!

QuickTime™ and aYUV420 codec decompressorare needed to see this picture.

Jovian PlanetsJovian Planets

• (Jovian) Weather Patterns(Jovian) Weather Patterns

• Coriolis EffectCoriolis Effect

Jovian PlanetsJovian Planets

• (Jovian) Weather Patterns(Jovian) Weather Patterns

Jovian PlanetsJovian Planets

•Jovian WeatherJovian Weather

QuickTime™ and aMicrosoft Video 1 decompressorare needed to see this picture.

Jovian PlanetsJovian Planets•Jovian Magnetic EnvironmentJovian Magnetic Environment

Jovian PlanetsJovian Planets•Jovian Magnetic EnvironmentJovian Magnetic Environment

Jovian PlanetsJovian Planets•Jovian Magnetic EnvironmentJovian Magnetic Environment

Radio Wave EmissionRadio Wave Emission

Jovian PlanetsJovian Planets•Jovian Magnetic EnvironmentJovian Magnetic Environment

Size of Size of Rotation Rotation Magnetosphere Magnetosphere Period Period

Mercury 10Mercury 1044 km 58 days km 58 days Venus 0 km 243 days Venus 0 km 243 days Earth 10Earth 1066 km 1 day km 1 day Mars 0 km 1 day Mars 0 km 1 day Jupiter 10Jupiter 1077 km 0.4 days km 0.4 days

LiquidLiquidMetallicMetallicInteriorInterior

?? YesYes YesYes NoNo YesYes

Jovian PlanetsJovian Planets•Jovian Magnetic EnvironmentJovian Magnetic Environment

Jovian PlanetsJovian Planets

• Jovian Magnetic EnvironmentJovian Magnetic Environment

• Essential Idea - Dynamo Mechanism for Magnetic FieldEssential Idea - Dynamo Mechanism for Magnetic Field

• Electrical Current => Magnetic FieldElectrical Current => Magnetic Field

• Rapid rotationRapid rotation• Liquid metallic coreLiquid metallic core• ConvectionConvection

Would you expect the Moon to have a significant magnetic field? Would you expect the Moon to have a significant magnetic field?

A) No, because it does not have a convective core. A) No, because it does not have a convective core. B) No, because it is not rapidly rotating.B) No, because it is not rapidly rotating. C) No, because of A and BC) No, because of A and B D) Yes, because it has a convective core.D) Yes, because it has a convective core. E) Yes, because it is rapidly rotating.E) Yes, because it is rapidly rotating.White) Yes, because of A and BWhite) Yes, because of A and B

ConcepTest!ConcepTest!

Jovian RingsJovian Rings

SaturnSaturn

NeptuneNeptune

JupiterJupiter

UranusUranus

Jovian RingsJovian Rings• SaturnSaturn

Cassini’s DivisionCassini’s Division

AA BBCC

Jovian RingsJovian Rings• SaturnSaturn

70, 000 km across …. 20 m thick!70, 000 km across …. 20 m thick!

Jovian RingsJovian Rings• SaturnSaturn

S

AB

RedshiftRedshift

BlueshiftBlueshift

Velocity AVelocity A >> Velocity BVelocity B

Keplerian!Keplerian!

EarthEarth

Jovian RingsJovian Rings• SaturnSaturn

Snowflakes (few microns) to Boulders (10 m)Snowflakes (few microns) to Boulders (10 m)