If the orbital period of Io, the innermost Galilean moon of Jupiter, is 1.77 days, what is the rotation period around its own axis? A) 3.54 daystwice the orbital period B) 1.77 days C) 1.18 days2/3 of the orbital period D) 5.31 daysthree times the orbital period 19b. In describing the observations of the movements of the moons of Jupiter, what is the difference between an occultation and an eclipse? A) An occultation is the passage of the moon into Jupiter”s shadow, whereas an eclipse is the disappearance of the moon behind the planet. B) There is no differencethese terms both describe the disappearance of the moon behind the planet. C) An occultation is the passage of the moon in front of the planet, whereas an eclipse is the disappearance of the moon behind the planet. D) An occultation is the disappearance of the moon behind the planet, whereas an eclipse is the passage of the moon into Jupiter”s shadow.
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