Home 1487715649-screen-shot-2017-02-21-at-51926-pm 1487715649-screen-shot-2017-02-21-at-51926-pm by Magic of science 4 months ago4 months ago The measured orbital periods of the planets, compared with those of Jupiter\’s Galilean moons and the four inner planets of the Solar System. The sizes of all the objects are approximately to scale.