Lesson C4: The Moons of the Planets

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Why has Titan been able to retain its atmosphere?

Titan is too far from the Sun for solar radiation to evaporate its atmosphere.

The inner planets only have 3 moons among them, so why does Jupiter have so many moons?

Jupiter is much more massive and is close to the asteroid belt.

Phobos and Deimos most closely resemble:

Asteroids

With a diameter of 4,879 km, the planet Mercury is actually smaller than which of the Galilean satellites?

Ganymede

In order of decreasing diameter, the Galilean satellites are:

Ganymede, Callisto, Io, Europa


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