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Jupiter is noticeably oblate because:

it rotates rapidly.

How does the mass of Jupiter compare with that of the other planets?

It is twice as massive as all other planets combined.

How does the density of Jupiter compare to the terrestrial planets?

Its density is less than any terrestrial.

How was the rotation rate of Jupiter's core determined?

by radio observations of Jupiter's rapidly spinning magnetosphere

What is interesting about Jupiter's rotation period?

It is the fastest in the solar system.

Essentially, the Great Red Spot is

a large cyclonic storm (hurricane).

What is the name used to describe the dark bands encircling Jupiter?


The most striking "cloudmark" in Jupiter's atmosphere is the:

Great Red Spot.

What is the probable source of the day-to-day variations in Jupiter's belts and zones?

differential rotation and the underlying zonal flow

The reason the jovian planets lost very little of their original atmosphere is due to their

large mass.

Together which two gases make up 99% of Jupiter's atmosphere?

Hydrogen and Helium

Alternating zones of rising and sinking gas in Jupiter's atmosphere

create light and dark bands.

How does the heat Jupiter radiates compare to the energy it receives from the Sun?

Jupiter radiates back into space about twice the energy it gets from the Sun.

What is the source of Jupiter's excess energy?

the slow escape of gravitational energy released during the planet's formation

What is true of Jupiter's magnetosphere?

It has a tail that extends at least to Saturn's orbit.

How does the magnetic tilt of Jupiter compare with our field?

Both are tilted about 10 degrees, but Jupiter is opposite in polarity.

What is thought to be the cause of Io's volcanos?

tidal stresses from both Jupiter and Europa

Which of the jovian moons is the largest and also the largest moon in the solar system, even bigger than Mercury?


Which of the four Galilean moons is not differentiated?


Where is Jupiter's ring located?

above Jupiter's cloud tops and inside the orbit of its inner-most moon

What is the source of Jupiter's intense radio waves and magnetism?

liquid metallic hydrogen swirling in the rapidly spinning mantle

What do our magnetic field and Jupiter's share?

auroral displays in the polar regions

Which of the Galilean moons is the densest and most geologically active?


What spacecraft was intentionally destroyed in 2003 so that it could not hit Europa?


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