Notes on Anual Motions 2

Notes on Anual Motions 2 - Sun in the sky. How does the...

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Homework 1 due NOW on chairs outside Day labs have started Night labs start Monday - see schedule on WebCT under Notes Homework 2 due next Friday - posted today It's all there on Webct.colorado.edu
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Annual Motions - Actual Actual motion = Earth orbits the Sun. Plane of orbit = ecliptic Lab topic
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Annual Motion: The sky varies as Earth orbits the Sun • As the Earth orbits the Sun, the Sun appears to move eastward along the ecliptic. • At midnight, the stars on our meridian are opposite the
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Unformatted text preview: Sun in the sky. How does the orientation of Earths axis change with time? Although the axis seems fixed on human time scales, it actually precesses over about 26,000 years. Polaris wont always be the North Star. Dates that Earth is opposite constellations has shifted by about a month over 2000 years Earths axis precesses like the axis of a spinning top...
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Notes on Anual Motions 2 - Sun in the sky. How does the...

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