2. Jupiter's moon Io has an orbit around Jupiter with a constant radius of 420,000 km and completes an orbit in a period of 1.8 days. a) Does Io obey...

2. Jupiter's moon Io has an orbit around Jupiter with a constant radius of 420,000 km and completes an orbit

in a period of 1.8 days.

a) Does Io obey the standard version of Kepler's laws? If not, which laws are different and why?

b) If Jupiter's moon Europa has an orbit with a constant radius of 670,000 km, estimate how long Europa

should take to orbit Jupiter. You should answer this question only with the information given above.