ASTR 3 Lecture Notes - Lecture 14: Kuiper Belt, Oort Cloud, Radial Velocity
Document Summary
Once gravity shapes to sphere, we call it a dwarf planet, but still part of the kuiper. A high inclination to the ecliptic (sun and earth): the long period asteroids are highly tilted! It is surrounding our solar system, too far away, but they come in sometimes: the long period comets. It is weakly bound to the sun by gravity. Earth is way smaller than the sun, so we need ways to identify these small planets. T(cid:28667)(cid:28664) ozon(cid:28664) (cid:28663)o(cid:28664)sn"t r(cid:28664)(cid:28665)l(cid:28664)(cid:28662)t ultr(cid:28660)v(cid:28668)ol(cid:28664)t, (cid:28668)t (cid:28660)(cid:28661)sor(cid:28661)s (cid:28668)t: in infrared, the planets peak its intensity due to its lower temperature. Here the intensity also increases as t increases. F is proportional to t4: gravity, use the newton"s t(cid:28667)(cid:28668)r(cid:28663) l(cid:28660)w. it r(cid:28664)qu(cid:28668)r(cid:28664)s (cid:28661)ot(cid:28667) t(cid:28667)(cid:28664) pl(cid:28660)n(cid:28664)t (cid:28660)n(cid:28663) t(cid:28667)(cid:28664) sun or(cid:28661)(cid:28668)t. We look for the velocity caused by such orbit through the doppler effect: away is red shift, toward is blue shift. (radial velocity method) Eg. positive: towards us; negative: away from us.
