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Astronomy Chapters 9-10

Terms in this set (18)

How does Jupiter protect our planet?
It's gravity attracts comets which might otherwise hit Earth.
How is Jupiter like a little sun?
It produces its own heat like the sun, has satellites, and is mostly hydrogen and helium.
What is the Great Red Spot on Jupiter?
It is a giant storm that has been raging for 300 years and is bigger than the whole Earth.
Why does Jupiter have stripes?
Jupiter's stripes are bands of clouds.
Name Jupiter's 4 largest moons.
Io, Ganymede, Europa, Callisto
Why are they called Galilean moons?
Galileo discovered them.
Can you deserve Amalthea?
Amalthea is a big jumble of rocks held together by gravity.
Amalthea
the reddest object in the solar system, one of Jupiter's moons.
How long does it take Jupiter to orbit the sun? (1 year)
12 Earth years
How long does it take for Jupiter to rotate once?
10 hours
What is Saturn made of?
mostly hydrogen and helium
Which planet is considered Saturn's twin?
Jupiter
What are Saturn's rings made of?
chunks of ice and rock and a few shepherd moons
What is a shepherd moon?
moons within the rings of Saturn that keep them from spreading out too far
Saturn's tilt is similar to ___________________'s tilt.
Earth
Saturn is the only planet in the solar system that is ____________ dense than water. (If there was a body of water big enough, Saturn would float!)
less
How many years does it take Saturn to orbit the sun?
30 Earth years
Why does Saturn look like it's being squeezed?
It is spinning so fat that the planet flattens at the poles and bulges at the center.
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