1. Mars orbits the Sun once every 1.88 years. Find the average distance of Mars from the Sun.
2. Two stars of mass 2Ms und 5Ms orbit each other at a distance of 1.5 x 10^10 m. Find the orbital period.
3. Jupter's moon Io orbits the planet with a period of 1.769 days at a distance of 4.22 x...
