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

Solar Eclipse Occurs when the Earth moves into the moon’s shadow Occurs when the Earth moves into the moon’s shadow Can only occur during the new moon phase Can only occur during the new moon phase

Quick NOVA Vid 5_vid_totaleclipse/ 5_vid_totaleclipse/

Or an animation, perhaps!

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

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Observers do not see an eclipse every new moon and full moon phase because the moon’s orbit is tilted 5° from the Earth’s orbit.

Umbra/Penumbra- DO NOT WRITE Umbra: The blackest part of a shadow from which all light is cut off 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 Penumbra: A partial shadow between regions of complete shadow and complete illumination

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

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