Astronomy 1021 Lecture Notes - Lecture 20: Metallic Hydrogen, Liquid Hydrogen, Solid Hydrogen

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

Document Summary

What planets need to have in order for their to be life: water, oxygen, ozone. Differences of these planets from terrestrial planets: No surface to land on (gas planets) They have the capacity to move things around because they are such big planets. Note: you are building these planets from a core that is made out of rock and metal, much like terrestrial planets. The further you go the further your materials are spread out. The more stuff around the core, the faster that planet can accumulate it. Since jupiter is after mars, it will also gather more material that was around mars. The overall density is very low because they have much more hydrogen and helium; however, they have more density around the core. The trend should be: lowest density -> higher density: jupiter, saturn, uranus, neptune, as the farther from the sun the more ice; however, jupiter does not follow that trend.