ASTR 101 Lecture 3: Constellations and Celestial Sphere
Document Summary
Stars were used for navigation in the older days. In the sky, it is called right ascension (0 to 360 degrees; 0-24 hours) and declination (- For latitude and declination, -90 is the south (celestial) pole, 0 is the (celestial) Greeks thought there was a sphere with stars attached to it (celestial sphere) Do not use constellations because different civilizations see them differently. Constellations will flip from north to south and vice versa. Constellations do not tell distance, although we view them as if they were same distance.
