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Like Titan, Triton has a nitrogen atmosphere.

It is likely that both Pluto and Triton were originally __________ .

The atmospheres of both Titan and Triton are mainly __________ .

The moon _______ may have erupted to create the E rings around Saturn.

Of all the Galilean satellites, the surface of Europa is the youngest in age.

Pluton is smaller than many moons in the solar system.

Prominence are extensions of the solar magnetic fields above sunspots.

All four ring systems orbit the equators of Jovian planets outside their Roche limits.

The haphazard terrain of Miranda suggests it was broken up by impact after it had differentiated, then fell back together as a jumbled maze.

Pluto’s density is most similar to