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Astronomy 1020-H Stellar Astronomy Spring_2016 Day-7 Course Announcements • SW-2 … hop to it. 1st set of Dark Sky observing nights: • • • • Mon. Feb. 8 – 7:30pm at the observatory. Tues. Feb. 9 is the weather backup if both are cancelled. Del Square Psi meeting – 5:30pm B310 – Wed. 2/3 Earth’s rotation causes the Sun, Planets, Moon and stars to appear to move when viewed from Earth Photo: Dr. Spencer Buckner Rotation Celestial Sphere Rotation Celestial Sphere Rotation Star B Star B 2 2 Star A Star A2 1 North Star 1 Celestial Sphere 2 3 3 1 1 4 4 3 3 Earth’s Equator 4 4 Celestial Sphere Rotation Celestial Sphere Rotation Figure 1 Figure 2 Horizon Rotation Celestial Sphere Rotation Celestial Sphere Rotation Star B Star B 2 2 Star A Star A2 1 North Star 1 Celestial Sphere 2 3 3 1 1 4 4 3 3 Earth’s Equator 4 4 Celestial Sphere Rotation Celestial Sphere Rotation Figure 1 Figure 2 Horizon Tutorial: Motion – pg.3 Work with a partner Read the instructions and questions carefully Talk to each other and discuss your answers with each another Come to a consensus answer you both agree on If you get stuck or are not sure of your answer ask another group If you get really stuck or don’t understand what the Lecture Tutorial is asking as one of us for help How long did it take to get this picture? Why does the sky change with your location? As you move away from the pole your horizon moves with you but the locations of the celestial poles and celestial equator remains the same Why does the sky change over the course of a year? As we orbit the sun the direction opposite the sun changes and we only see the stars when the sun is not up