Astr Motions of the Sun Lab 4.docx - Name Motions of the...

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Name: Motions of the Sun – Student Guide Seasonal Motion Work through the explanatory material on Sidereal vs. Synodic and Seasons and the Zodiac . All of the concepts that are covered in these pages are used in the Paths of the Sun Simulator. Question 1: For each of the following statements respond shorter, the same, or longer. (A) If the Earth revolved more rapidly, its sidereal day would be the same . (B) If the Earth revolved more rapidly, its solar day would be shorter . (C) If the Earth rotated more rapidly, its sidereal day would be shorter . (D) If the Earth rotated more rapidly, its solar day would be ________________. Question 2: Use the Zodiac Explorer to answer the following questions. (A) On May 25 th , the sun is in the constellation of ___________________. (B) What would be a good time of year to observer the constellation Aries? ________________ (C) On July 4 th at midnight, the constellation __________________ is on the observer’s meridian. (D) At sunrise on Christmas Day, the constellation on the observer’s meridian is ______________________. Daily Motion with Seasonal Effects Work through the explanatory material on Meridional Altitude and Sun Paths. Question 3: Complete the following table on meridional altitudes. You are encouraged to check your answers with the meridional altitude explorer, but you should make every effort to solve these problems yourself first. Note that part D is completed for you. Location Object Meridional Altitude North Pole (lat = 90 ° N) Betelguese (dec. = +7) NAAP – Motions of the Sun 1/7 Z
Location Object Meridional Altitude Equator (lat = 0 ° ) Sirius(dec = -16 ° ) Location Object Meridional Altitude Lincoln NE (lat = 41 ° N) Summer Solstice Sun Z Location Object Meridional Altitude Iquique, Chili (lat = 20 ° S) Sirius(dec = -16 ° ) 86 ° NAAP – Motions of the Sun 2/7 N S Z N S N S

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