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Unformatted text preview: Class Logistics:
Class Logistics: AS 101 Lecture 4 AS • Problem Set 1: • Problem Set 2: Due today in class Solution Set available Web based – see email If you cannot access web email prof Oppenheim or TF. Today’s Class
• • • Observing the Night Sky – coordinates and perspective Angles and sizes Seasons & Earth’s orbit Supriya Chakrabarti Shoepreoh Chalkrowboretea The sky varies as Earth orbits the Sun The Ecliptic is the path of the sun Ecliptic through the celestial sphere Equinoxes Equinoxes Vernal Equinox
(N. Hemisphere) • Spring Equinox • Mar 20 2010 1:32 PM EDT • Where is the Sun on this date: At Dawn At Noon:
• • • From the N. Pole. How high above the horizon? From Australia From Boston Autumnal Equinox: Sept. 23 (fall) Summer Solstice: June 22 Winter Solstice: Dec 21 How high above the horizon? Apparent Motion of Sun Defines the Ecliptic Plane Apparent Derrick Taylor: How many degrees does the Sun move around the Celestial Sphere each day? Special Latitudes on the Earth Special Joseph kenny: What is special about N. Hemisphere winter solstice at the Antarctic circle? Seasonal Change in Sun’s Altitude Seasonal
Sun at same time each day over a year. ...
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- Spring '11