ASTR 1101 Lecture Notes - Lecture 2: Celestial Sphere, Bayer Designation, Observable Universe

• School: Mount Royal University
• Department: Astronomy
• Course: ASTR 1101
• Professor: Nicholas Hill

Document Summary

Chapter 2: the universe we can observe 13. 7 billion light years in any direction because it"s old af. Nothing exists outside of the universe (nothing) not even time or energy (visible, dark, etc) Star brightness: bayer designation - assigns a lower case greek letter and the star"s parent constellation in genitive (alpha is brightest, beta is second brightest etc. , magnitude scale: the astronomical brightness scale. The larger the number the fainter the star. The dimmest star that can be seen with the naked eye is a 6.