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History of Solar System formation and evolution hypotheses wikipedia , lookup
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Formation and evolution of the Solar System wikipedia , lookup
Outer Planets Section 14-4 Outer Planets The gas giants- Jupiter, Saturn, Uranus, and Neptune Much larger than Earth and do not have solid surfaces Atmospheres are all very similar to each other Mostly hydrogen and helium gas Jupiter (Roman Supreme God) Very thick atmosphere-mostly hydrogen and helium Great Red Spot - ongoing storm that is at least twice the size of Earth. The largest of all the planets Has 63+ moons Saturn (Roman God of Agriculture) Second largest planet Has 47+ moons Rings of ice and rock orbit the planet and can be seen from earth without special optics Uranus (Roman’s Earliest Supreme God – Grandfather of Jupiter) Rotates from top to bottom-tilted 90 Looks bluish because of methane in atmosphere Has 27+ moons Neptune (Roman God of the Sea) Atmosphere similar to other gas giants and has visible clouds Had a Great Dark Spot - storm the size of earth that is now gone Has 13+ moons Pluto (Roman God of the Underworld) Is now a dwarf planet Has a solid surface Size is less than 2/3 Earth’s moon