What is the key difference between the IAU test and the geophysical test regarding a body like Titan if it orbited the Sun?
Answer
The geophysical test would qualify it based on its physical state, while the IAU test would disqualify it based on its current orbital behavior
The geophysical test focuses on *what the object is* (round, not a star), meaning a detached Titan would qualify. The IAU test focuses on *what the object does* (its orbital dynamics), meaning its origin as a moon is irrelevant if it's in a dominant orbit.
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