Astronomy 1021 Lecture Notes - Lecture 11: Retrograde And Prograde Motion, Water Cycle, Pioneer 10

• School: Western University
• Department: Astronomy
• Course: Astronomy 1021
• Professor: Robert Cockcroft

Document Summary

Small amount of rock and metal at core. Smaller amount of rock and metal at core. Further from the sun, material more spread out. Ices are more dense, so we would expect density to increase as you get further from the sun. Explains why jupiter is not much larger than saturn but it is three times more massive. H and he, and all amount of h-compounds. Uranus and neptune: internal pressures not high enough for metallic hydrogen. Driven by sun"s energy and hear generated within. Colours due to different chemical at different temperatures/heights. In spite of their mass and size, not spherical. Rapid rotation causes them to bulge out at the equator. Increasing distance from jupiter: io, europa, ganymede and callisto. No impact craters but lots of volcanic activity. Io is about the same size as the moon. Europe, ganymede and callisto have surface water ice. Methane cycle similar to water cycle on earth.