AstroCh2MoonPhasesF10Notes

AstroCh2MoonPhasesF10Notes - lunar clock in class and show...

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1 August 30, 2010 1 The Moon Chapter 2 Physics 106C Fall 2010 August 30, 2010 2 The Moon’s Orbit
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2 Does the Moon Rotate? how do we know that it does or does not rotate? August 30, 2010 3 August 30, 2010 4 Two types of months ”... Synodic : Sidereal : Moon ʼ s orbit tilted __ degrees compared to the ecliptic See page 25
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3 The Phases of the Moon I don ʼ t expect you to know the phase diagram but I do expect you to know the order of the phases and what they look like from Earth: Draw some little sketches (dark = we can ʼ t see): waxing crescent first quarter waxing gibbous full waning gibbous last quarter waning crescent new August 30, 2010 5 See page 24 The Lunar Clock Make sure you understand the connection between the time of day, the phase of the moon and the location of the moon in the sky I will hand out a separate copy of the
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Unformatted text preview: lunar clock in class and show you how to use it August 30, 2010 6 4 August 30, 2010 7 ~ 50 min later on successive nights. Say tonight is full moon: 24 hours later. .. Rise Time of the Moon Total Solar Eclipse • total eclipse: • partial eclipse: • annular eclipse: August 30, 2010 8 Not drawn to scale! • umbra: • penumbra 5 August 30, 2010 9 Total Solar Eclipse August 30, 2010 10 Eclipse Paths 6 August 30, 2010 11 Total Lunar Eclipse Perfect alignment: Sun - Earth - Full Moon Not drawn to scale! Earth’s shadow hitting Moon--drawn to scale Why No Monthly Eclipses? • If we have both a full moon and a new moon every month, why is there not a solar eclipse at new moon and a lunar eclipse at full moon? August 30, 2010 12...
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