ESSENTIAL QUESTIONS:
1.Can you describe how the positions of the Sun, Moon, and Earth determine the type of eclipse? 2.Can you model how the shadow cast in an eclipse causes partial and total eclipses? Eclipse •The total or partial obscuring of a planet, star, or moon by another celestial object •The passing of a celestial object into the shadow of a planet, star, or moon •Types: solar and lunar Solar Eclipse •Occurs when the Moon passes between the Earth and the Sun totally or partially obscuring Earth’s view of the sun •The moon casts a shadow on part of the Earth. •Occurs during the new moon phase Occurs during daylight Lunar Eclipse •Occurs when the Earth passes between the Moon and the Sun. •The Earth casts a shadow on the Moon blocking all or a portion of it. •Occurs during the full moon phase Occurs at night Total Solar Eclipse •When the moon blocks out the Sun entirely Partial Solar Eclipse •When the moon blocks out a portion of the Sun Annular Eclipse •When the Moon is at its furthest point in orbit •Its shape will not cover the Sun completely. •This is when you can see a thin ring of light emerging from the outside rim of the moon. Total Lunar Eclipse •Occurs when the moon completely passes into the darkest part (umbra) of Earth’s shadow •Only occurs during full moon phase •Occurs at night Partial Lunar Eclipse •Occurs when the moon passes into the lightest part (penumbra) of Earth’s shadow. •Occurs only at Full moon phase •Occurs at night Umbra •The darkest part of a shadow •The cone-shaped region of full shadow cast by Earth and the Moon during an eclipse. Umbra/Solar Eclipse •When the umbra from the Moons shadow touches Earth, you have a total solar eclipse. •Point C in the diagram Umbra/Lunar Eclipse •The entire disk of the Moon is darkened as it passes through the umbra •The area of partial shadow surrounding the total shadow (umbra) cast by the Earth or Moon. Penumbra/Solar Eclipse •When the penumbra of the Moon’s shadow touches Earth you have a partial solar eclipse •Point B in the diagram Penumbra/Lunar Eclipse •When the penumbra of the Earth’s shadow touches the Moon you have a partial/penumbral lunar eclipse Comments are closed.
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Erik E. Mason
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