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Lecture

Friday October 12th 2012.docx

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Department
Astronomy
Course
ASTR 1P01
Professor
Bozidar Mitrovic
Semester
Fall

Description
Friday October 12 2012 Astronomy Lecture: Aristarchus of Samos(310-230 b.c): - proposed a theory that the earth is rotation on its axis and revolving around the sun - which was based on observations o he concluded that the sun must be a much greater distance than the moon. He argued that if those distances were comparable one would observe the following:  when one observes the first quarter moon the angle of the earth and the moon is at 90 degrees  one observers the third quarter moon, the angle would be at 90 degrees again  the time between the 3 quarter and the 1 quarter would be st much shorter than the time to get from the 1 quarter to the 3 quarter  and if the moon is revolving at a constant speed (A reasonable assumption) the interval of time form 3 quarter moon to 1 st st rd quarter would be shorter than the interval between 1 and 3  intervals are about 2 wee
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