Answer:
THE BOLD WORD HELP YOU WHAT YOU ARE TALKING ABOUT
Explanation:
The surface is constantly being resurfaced, covering all impact craters
Io's orbit is in 2:1 resonance with the orbit of Europa and in 4:1 resonance with the orbit of Ganymede. The period of Io's orbit is 1.8 days. What then, must be the orbital periods of Europa and Ganymede?
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