Largest moon in the solar system

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Your new ahaGanymede

Ganymede is larger in diameter than Mercury but has much less mass. Source: Ganymede (moon) ↗

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03Moon with a thick nitrogen atmosphereRECALL
Titan
Saturn's largest moon
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04This icy Galilean moon, the second outward from Jupiter, is a major target in the search for a subsurface ocean.RECALL
Europa
Europa's likely ocean lies beneath an icy crust. Other moons also have subsurface oceans, so that clue alone does not identify it.
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05The Moon's changing phases · explain why its apparent illuminated shape changes through the monthRECALL
As the Moon orbits Earth, we see different fractions of its sunlit half.
Ordinary lunar phases are not caused by Earth's shadow. That shadow is involved in a lunar eclipse.
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