Eclipses Page 564

The Next Lunar Eclipse will be September 28th

POM Chart (in your note book) PHENOMENON: What did you observe? What evidence do you have? OBJECTS: Define the system. What objects are interacting? MOTION: Describe the motion that in the model that explains your observations

Model it Use the Sun, Earth, Moon model to demonstrate how the moon can “disappear” from view and return to view later.

Lunar Eclipse Occurs at Full Moon Sun and moon are in OPPOSITE directions from earth The moon moves into the earth’s shadow, blocking the Sun from shining on the moon and it darkens. Visible to all on night side of earth Last 2-3 hours

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Lunar eclipse The curved edge of the Earth’s shadow begins to cut across the face of the moon Until the entire moon’s face is covered The moon takes on a red glow due to refraction (bending) of the sunlight through the earth’s atmosphere.

Model it Watch the eclipse in Australia Using the sun, Earth Moon model, show how the Sun can completely disappear from view * Next Solar eclipse is Aug 21,

Solar Eclipse Occurs when sun and moon are in the same direction from Earth Moon passes directly in front of the Sun Occurs during the day, with a new moon Turns day into night – sunlight is reduced to almost nothing! Lasts a few minutes Only a small area can see the total eclipse

Page 565 Umbra: –Point of the sun’s shadow –270 km wide shadow area (162 miles) –Shadow moves across the earth at 1700km/hr –Solar eclipse lasts only 7.5 min. Penumbra: –Wider part of the sun’s shadow –Area of partial eclipse

Corona: as the moon covers the body of the sun, the sun’s atmosphere is seen as a glowing ‘crown’

Lunar or Solar eclipse?? Is the moon causing a shadow or in a shadow?

The moon orbits the Earth every 28 days So is there an eclipse every month? Look at some Data on eclipses Look at a Model: tes/dl/free/ x/78778/Eclipses_Nav.swf::Eclipse%20Interactive