Tides

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Eclipses

• Since the Earth and moon are not self-luminous
  (dont create their own light), they cast a
  shadow
• Eclipse When a celestial object fully or
  partially moves into the shadow of another
  celestial object

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Solar Eclipse

• Occurs when the Earth moves into the moons
  shadow
• Can only occur during the new moon phase

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Quick NOVA Vid

• http//www.teachersdomain.org/asset/ess05_vid_tota
  leclipse/

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Or an animation, perhaps!
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Lunar Eclipse

• Occurs when the moon moves into the shadow of the
  Earth
• Can only occur during the full moon phase

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• http//www.youtube.com/watch?v2dk--lPAi04

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Observers do not see an eclipse every new moon
and full moon phase because the moons orbit is
tilted 5 from the Earths orbit.
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Umbra/Penumbra- DO NOT WRITE

• Umbra The blackest part of a shadow from which
  all light is cut off
• Penumbra A partial shadow between regions of
  complete shadow and complete illumination

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Exit Pass

• What is a solar eclipse and during which moon
  phase does it occur? Draw a diagram
• What is a lunar eclipse and during which moon
  phase does it occur? Draw a diagram

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Random But Relevant Vids

• Pics from Hubble