Lab2 Worksheet - PHYS 1403 Lab 2 THE CELESTIAL SPHERE I...

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PHYS 1403 Lab 2: THE CELESTIAL SPHERE I Worksheet Enter your answers to each question in the data tables and yellow highlighted areas below. When completed, please save and attach this file to the assignment – Lab 2 – in Canvas. PRELAB QUESTIONS 1. What is the unit of measure of Right Ascension? of Declination? The unit of measure of Right Ascension is time. Declination is measured in degrees. 2. How much does the declination of the Sun vary over one year? It changes from 23.5 degrees North to 23.5 degrees South and back within the year. 3. If you find two stars with the same Right Ascension, are they necessarily close together in the sky? Why or why not? Not necessarily though the night sky can be tricky the can potentially be far apart. The brightness can make them appear closer together than in reality. EXERCISE In this exercise you will be using Stellarium in order to familiarize yourself with the celestial sphere. Once you have installed the program, find Stellarium in the “Start” menu at the bottom of your computer desktop. After the program has started, you will need to set your home location. If you move your cursor to the lower part of the left side of the screen, a vertical menu of icons should appear. Click the top icon called “Location window”. Choose “McKinney, United States” from the list of cities given, and then click the “Use as Default” box in the bottom left of the window. Now that you have set your location (and closed the Location window), you will see a scene representative of the sky conditions outside. If it is still daylight outside, you will see daylight on your computer screen; and if it is night outside, you will see night on your computer screen.
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