EclipsesEclipses

Since the Earth and moon are not Since the Earth and moon are not self-luminous (don’t create their self-luminous (don’t create their own light), they cast a shadowown light), they cast a shadow

Eclipse: When a celestial object Eclipse: When a celestial object fully or partially moves into the fully or partially moves into the shadow of another celestial objectshadow of another celestial object

Solar EclipseSolar Eclipse

Occurs when the Earth moves Occurs when the Earth moves into the moon’s shadowinto the moon’s shadow

Can only occur during the new Can only occur during the new moon phasemoon phase

Quick NOVA VidQuick NOVA Vid

http://www.teachersdomain.org/asset/http://www.teachersdomain.org/asset/ess05_vid_totaleclipse/ess05_vid_totaleclipse/

Or an animation, perhaps!Or an animation, perhaps!

Lunar EclipseLunar Eclipse

Occurs when the moon moves Occurs when the moon moves into the shadow of the Earthinto the shadow of the Earth

Can only occur during the full Can only occur during the full moon phasemoon phase

http://www.youtube.com/watch?v=2dk--http://www.youtube.com/watch?v=2dk--lPAi04lPAi04

Observers doObservers donot see an eclipse everynot see an eclipse everynew moon and full moonnew moon and full moon

phase because the moon’s phase because the moon’s orbit is tilted 5° from theorbit is tilted 5° from the

Earth’s orbit.Earth’s orbit.

Umbra/Penumbra- DO NOT Umbra/Penumbra- DO NOT WRITEWRITE

Umbra: The blackest part of a shadow Umbra: The blackest part of a shadow from which all light is cut offfrom which all light is cut off

Penumbra: A partial shadow between Penumbra: A partial shadow between regions of complete shadow and complete regions of complete shadow and complete illuminationillumination

Exit PassExit Pass

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

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

Random But Relevant VidsRandom But Relevant VidsPics from Hubble