Question

callisto, the fourth moon of jupiter's, takes 17 days to orbit jupiter. if i stand on the surface of callisto and see jupiter high in the sky over my head, and then wait 8.5 earth days in the same spot, where will i see jupiter? a. you won't see it; it will only be visible from the other side of callisto b. setting in the west c. overhead, where it was before d. rising in the east e. we need more information to give even a rough estimate of where jupiter will be

Answer 1

a) if callisto is directly overhead at noon then in 8.5 days it will be high overhead at midnight - this is assuming callisto does not rotate, that is the same side of callisto always faces Jupiter

Suppose one is on the moon. When the moon is full one on the moon would not see the earth because earth is between moon and sun - 1/2 period later one could see the earth in full view beause the moon is between the earth and the sun

Again, one has to consider the rotation of callisto with respect Jupiter

The moon does not rotate with respect to earth but rotates once with respect to the fixed stars in 28 days