ASTR 3 Lecture Notes - Lecture 13: Roche Limit, Semi-Major And Semi-Minor Axes, Solar Wind

• School: UCLA
• Department: Astronomy
• Course: ASTR 3
• Professor: Steven Furlanetto

Document Summary

Most of their internal structure is hydrogen and helium. 20,000 km: hydrogen turned into a metal under high pressure. J(cid:28649)(cid:28644)i(cid:28648)(cid:28633)(cid:28646)"(cid:28647) i(cid:28642)(cid:28648)(cid:28633)(cid:28646)i(cid:28643)(cid:28646) i(cid:28647) (cid:28632)i(cid:28634)(cid:28634)(cid:28633)(cid:28646)(cid:28633)(cid:28642)(cid:28648)ia(cid:28648)(cid:28633)(cid:28632): rocky core, hydrogen and helium. Saturn: the metallic core is smaller, because it is 1/3 the mass of jupiter; but the core is not 3 times smaller the jupiter. But instead of liquid metallic layer (due to low gravity), we have slushy icy layers (ammonia, methane ice). They are still hot in the middle, so it requires great pressure to maintain the ice. Magnetic fields: (cid:28647)(cid:28667)(cid:28664)(cid:28684) (cid:28667)(cid:28660)(cid:28681)(cid:28664) (cid:28672)(cid:28660)(cid:28666)(cid:28673)(cid:28664)(cid:28679)(cid:28668)(cid:28662) (cid:28665)(cid:28668)(cid:28664)(cid:28671)(cid:28663)(cid:28678) (cid:28676)(cid:28680)(cid:28668)(cid:28679)(cid:28664) (cid:28678)(cid:28668)(cid:28672)(cid:28668)(cid:28671)(cid:28660)(cid:28677) (cid:28679)(cid:28674) (cid:28664)(cid:28660)(cid:28677)(cid:28679)(cid:28667)"(cid:28678). J(cid:28680)(cid:28675)(cid:28668)(cid:28679)(cid:28664)(cid:28677) (cid:28668)(cid:28678) (cid:28672)(cid:28674)(cid:28677)(cid:28664) (cid:28662)(cid:28674)(cid:28672)(cid:28675)(cid:28671)(cid:28664)(cid:28683) (cid:28661)(cid:28664)(cid:28662)(cid:28660)(cid:28680)(cid:28678)(cid:28664) of its interaction with its moons. The solar storm, p(cid:28660)(cid:28677)(cid:28679)(cid:28668)(cid:28662)(cid:28671)(cid:28664)(cid:28678) (cid:28685)(cid:28674)(cid:28674)(cid:28672) (cid:28679)(cid:28674) j(cid:28680)(cid:28675)(cid:28668)(cid:28679)(cid:28664)(cid:28677)"(cid:28678) (cid:28672)(cid:28660)(cid:28666)(cid:28673)(cid:28664)(cid:28679)(cid:28668)(cid:28662) (cid:28665)(cid:28668)(cid:28664)(cid:28671)(cid:28663). Liquid hydrogen is generating this dynamo process. (cid:28648)(cid:28677)(cid:28660)(cid:28673)(cid:28680)(cid:28678) (cid:28660)(cid:28673)(cid:28663) (cid:28641)(cid:28664)(cid:28675)(cid:28679)(cid:28680)(cid:28673)(cid:28664) (cid:28663)(cid:28674)(cid:28673)"(cid:28679), but ammonia conducts electricity, so they still have magnetic fields, just not as strong.