Describe the differences in the chemical makeup of the inner and outer parts of the solar system. Why would a tourist brochure (of the future) describing the most dramatic natural sights of the giant ...Describe the differences in the chemical makeup of the inner and outer parts of the solar system. Why would a tourist brochure (of the future) describing the most dramatic natural sights of the giant planets have to be revised more often than one for the terrestrial planets? The water clouds believed to be present on Jupiter and Saturn exist at temperatures and pressures similar to those in the clouds of the terrestrial atmosphere.