AST 1002 Lecture Notes - Lecture 1: Solar System, Observable Universe

• School: University of Florida
• Department: Astronomy
• Course: AST 1002
• Professor: Anthony Gonzalez

Document Summary

We are moving with the earth in several ways, and at surprisingly fast speeds. Earth rotates around its axis once every day. The earth orbits around the sun once every year: 108,000 km/h~30 km/s, the earth"s a(cid:454)is is tilted b(cid:455) (cid:1006)(cid:1007). 5 degrees. The sun moves relative to the other stars in the local solar neighborhood. Our sun and the stars of the local solar neighborhood orbit around the center of the. Su(cid:374)"s speed = 800,000 k(cid:373)/h or (cid:1006)00 k(cid:373)/s. Galaxies are carried along with the expansion of the universe, which was discovered in. Solar system moves among tars ~ 70,000 km/h. Total stars= (stars per galaxy) x (# of galaxies)