Why does Jupiter have several distinct cloud layers? You can see from the graph to the right that these condense at lower altitudes in Saturn's atmosphere than they do in Jupiter's atmosphere. -- Once the Jovian protoplanets reached the critical size at which they could capture nebular gas, they grew quickly, and their capture rate increased as the gravitational fields intensified. Rings are composed of countless small pieces of rock and ice, each orbiting its planet like a tiny moon. In contrast, The jovian planets, however, formed farther from the Sun where ices and rocks were plentiful. The jovian planets, however, formed farther from the Sun where ices and rocks were plentiful. Do the jovian planets rotate more or less quickly than terrestrial planets?Mostly H and He gas, hydrogen compounds: water, methane, and ammoniaBlue light reflects off methane clouds making the planets appear blueThey contain more hydrogen compounds and proportionally less H, HeAbout twice as much energy as it absorbs from the sunWhy are the Jovian planets so different from terrestrials?They formed beyond the frost line, forming large, icy planetesimals which were massive enough to capture H/He far from the Sun to form gaseous planetsWhat is the difference between jovian planets and stars?Jovian planets generate some heat through contraction, but most light is reflected, and these planets are not hot enough at their cores to create nuclear fusionsOutside the frost line, rocky cores could attract icy, solid material fast enough that planets were already quite massive before early solar wind blew the gas nebula awayAll are made of rock, metal, and hydrogen compounds, and are about 10x the mass of EarthAccretion of planetesimals took longer, and there was not much time for gas capture before nebula was cleared out by the solar windCentral core of H compounds, rocks, and metals; next layer contains metallic H, followed by layer of liquid H, followed by gaseous atmosphere; the pressure, density, and temperature all increase with depthAdding mass to a Jovian planet does not necessarily increase its size because stronger gravity will compress the mass to a greater densityAll cores about the same mass but have different amounts of surrounding H and He; accretion took longer in the more spread out regions of the outer solar system, and therefore more distant planets captured less gas from the solar nebula before it was blown awayMultiple cloud layers determine colors, all have strong storms and windsDifferent gases condense at different temperatures, and each cloud layer is at an altitude where a particular gas may condense If we compare terrestrial planets and jovian planets, we find that jovian planets have a large number of satellites or ‘moons’.