ASTR 3 Lecture Notes - Lecture 10: Earthflow, Wind Wave, Plate Tectonics
Document Summary
Lecture 10: the solid earth and other planets. We seek patterns in the terrestrial planets including mercury, venus, earth, and mars, (plus the moon): close to the sun; primarily rocky; of earth"(cid:28678) mass or smaller. Cratering: earth and venus have very little, moon and mercury a lot: this correlates with size, largely because large planets erase craters through geology. Densities: it decreases with distance from sun. (mercury is the densest) Magnetic fields: generated by a rotating liquid metal layer. M(cid:28664)(cid:28677)(cid:28662)(cid:28680)(cid:28677)y (cid:28660) (cid:28672)(cid:28674)(cid:28663)(cid:28664)(cid:28677)(cid:28660)(cid:28679)(cid:28664) (cid:28674)(cid:28673)(cid:28664) (cid:28679)(cid:28667)(cid:28660)(cid:28679)"(cid:28678) (cid:28673)(cid:28674)(cid:28679) (cid:28668)(cid:28673) (cid:28679)(cid:28667)(cid:28664) (cid:28662)(cid:28664)(cid:28673)(cid:28679)(cid:28664)(cid:28677), (cid:28661)(cid:28680)(cid:28679) (cid:28679)(cid:28667)(cid:28664) (cid:28677)(cid:28664)(cid:28678)(cid:28679) (cid:28674)(cid:28665) (cid:28679)(cid:28667)(cid:28664) (cid:28675)(cid:28671)(cid:28660)(cid:28673)(cid:28664)(cid:28679)(cid:28678) (cid:28663)(cid:28674)(cid:28673)"(cid:28679) have a magnetic field. Mercury, mars, and all other solar system planets have the same rotation direction as earth: (cid:28679)(cid:28667)(cid:28664)y"(cid:28677)(cid:28664) counterclockwise. However, venus rotates very slowly around itself and in the opposite direction: clockwise. The rotation of venus takes longer than its orbit around the sun! B(cid:28674)(cid:28679)(cid:28667) (cid:28649)(cid:28664)(cid:28673)(cid:28680)(cid:28678) (cid:28660)(cid:28673)(cid:28663) m(cid:28664)(cid:28677)(cid:28662)(cid:28680)(cid:28677)y (cid:28677)(cid:28674)(cid:28679)(cid:28660)(cid:28679)(cid:28664) (cid:28681)(cid:28664)(cid:28677)y (cid:28678)(cid:28671)(cid:28674)(cid:28682)(cid:28671)y. t(cid:28667)(cid:28664) (cid:28664)(cid:28660)(cid:28677)(cid:28679)(cid:28667)"(cid:28678) rotation is the fastest!
