III' Annual cycle of the Sun

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• III. Annual cycle of the Sun
• IV. The cycles of the Moon
• A. Motion of the Moon
• 1. moon appears to move east among star
  in one night
• 2. same face of moon is visible
• 3. moon appears to change shape during
  its 28 day cycle

Waning Waxing Crescent Gibbous
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Sky at Sunset
New moon is invisible
Sky at Sunrise
Full Moon rises at Sunset
New moon is invisible
Full moon sets at sunrise
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• IV. The cycles of the Moon
• A. Motion of the Moon
• B. Tides
• 1. gravity from moon pulls on oceans
  facing moon.
• 2. moons gravity also pulls the land
  slightly away from oceans on far side,
  leaving a smaller tide on side of earth
  opposite of the moon.
• 3. tides occur twice a day
• 4. spring tide at full or new moon-
  moons gravity is combined with gravity from
  sun
• 5. neap tide at ¼ or ¾ moon

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• IV. The cycles of the Moon
• A. Motion of the Moon
• B. Tides
• C. Lunar Eclipses occurs at full moon when
  the moon passes through the shadow of the
  earth
• 1. umbra region of total shadow
• 2. penumbra region of partial shadow
• 3. at total eclipse it does not disappear
  completely, light is refracted through earths
  atmosphere ? copper glow
• 4. 1-2 each year

epod.usra.edu
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IV. The cycles of the Moon A. Motion of the
Moon B. Tides C. Lunar Eclipses D. Solar
Eclipses the moons angular diameter covers the
sun 1. total eclipse can be see from path of
totality 2. darkness lasts a few minutes 3.
annular eclipse moon is a little too small to
cover the sun, due to elliptical orbit of
moon 4. next major eclipse in US ? 8/21/2017
www.bbc.co.uk
csep10.phys.utk.edu
www.kopernik.org