Astronomy 1021 Chapter Notes - Chapter 1: Milky Way, Spiral Galaxy, Particle Accelerator

• School: Western University
• Department: Astronomy
• Course: Astronomy 1021
• Professor: Jan Cami

Document Summary

Chapter 1: the scale of the cosmos: space & time. Designed to stimulate the beginning of the universe. Usually given as diameter of the region. Every time you move 10times away, your field of view changes an area 10 x 10 larger than previous area. The sun & its planets, asteroids, comets, etc. Small, nonluminous bodies that shine by reflecting sunlight. A globe of gas held together by its own gravity. Supported by internal pressure of its hot gases that generate energy by nuclear fusion. There are thin gas that fills the spaces between the stars they give birth to new stars. Sun self-luminous ball of hot gas generating own energy / 110 times larger than earth diameter. Large system of stars, star clusters, gas, dust, nebulae orbiting a common center of mass. Hazy band of light that circles our sky. Our galaxy is called milky way galaxy . Visible in night sky as the milky way.