Two planets have equal mass and equal amounts of atmosphere of identical chemical composition, but one is closer to the Sun than the other. They formed from radically different material. Terrestrial planets are smaller than Jovian planets. High temperatures in the inner solar system made the difference. The many satellites of the Jovian planets changed the planet s atmosphere.
Jovian planets are much larger than terrestrial planets.
Its epicycle is so large that it carries the planet both closer and farther than Neptune from the Sun. Its orbit is more elliptical than the orbit of other planets. Comets appear to come primarily from the direction of the constellation Hercules. Comets are observed in all directions on the celestial sphere. Comets are best seen after midnight.