AST 2002 Lecture Notes - Lecture 1: Celestial Equator, Semi-Major And Semi-Minor Axes, Apparent Retrograde Motion
Document Summary
Astronomy 2002 exam 1 study guide, fall 2016. This exam will cover what i talked about in class in your book this corresponds to chapters 1-4. 2, excluding section 3. 1. The celestial sphere takes the shape of a hemisphere due to the fact that we cannot see below us because of the horizon. Revolution: when one object completes a circular path around another object. The earth is angled differently towards the sun throughout the year and give us different sun intensities and four different seasons. Since earth is at different positions in space over the year we also see different constellations. Rotation: the earth completes one rotation every 24 hours and rotates counterclockwise and causes the sun to rise in the east and set in the west. Tilt: the tilt is also involved in causing the seasons due to different angles being exposed to the sun.
