the motion of the sun. ack-hole-powers-cosmic-flashlight- illuminating-the-cosmic-web
TRANSCRIPT
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The Motion of the Sun
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• http://www.astronomy.com/news/2014/01/black-hole-powers-cosmic-flashlight-illuminating-the-cosmic-web
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Draw the Earth’s Revolution
• Day/night length• Equinox and solstice• Seasons
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Highest and Lowest Declination
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Annual Motion of the Sun
The Declination of the Sun…varies between –23º and +23º
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Where is the sun…
• During the Equinox?• During the Summer solstice?• During the Winter solstice?
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Life at the Poles
• North Pole- 6 months of daylight beginning at the spring (vernal) equinox and ending at the autumnal equinox– The other 6 months of the year it is night
• South Pole- 6 months of daylight beginning at the autumnal equinox and ending in the vernal equinox– The other 6 months of the year it is night
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What shape is the Earths Revolution around the sun?
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Misconception
• Earth’s seasons are caused by moving closer and further from the sun…false
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Earth’s Distance from the Sun
• Perihelion (closest to the Sun) is around January 3 when Earth is about 91,405,436 miles from the Sun.
• Aphelion (farthest from the Sun) is around July 4 when Earth is about 94,511,989 miles from the Sun.
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Weather
• Weather in the southern hemisphere is more constant than the northern. Reason?
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Drawing the Suns Path
• Recap– Draw our bubble with the equator, zenith, and
celestial north pole– Where will the sun be located on the two solstices
and the two equinox