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Eclipses

Eclipses. Solar Eclipse. Occurs when the Moon is positioned between the Sun and Earth and all are in complete alignment Occurs during a NEW Moon The Moon’s shadow falls on a portion of the Earth. The Geometry of a Solar Eclipse. Another View of Solar Ecli pse Geometry.

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Eclipses

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  1. Eclipses

  2. Solar Eclipse • Occurs when the Moon is positioned between the Sun and Earth and all are in complete alignment • Occurs during a NEW Moon • The Moon’s shadow falls on a portion of the Earth

  3. The Geometry of a Solar Eclipse

  4. Another View of Solar Eclipse Geometry

  5. Total Solar Eclipse • Occurs when the Moon's umbral shadow sweeps across Earth's surface. • The track is typically 10,000 miles long but no more than 167 miles wide. It covers less than 1% of Earth's entire surface area. • In order to see the Sun become completely eclipsed by the Moon, you must be somewhere inside the umbra.

  6. Total Solar Eclipse

  7. Partial Solar Eclipse • Partial solar eclipses are visible from within the penumbra. • Remember, the penumbral part of the shadow is larger than the umbral part of the shadow cone

  8. Partial Solar Eclipse

  9. Annular Eclipse • Occurs when the Moon is too far from Earth to cover the Sun completely • Outer edge of the Sun is seen as a ring

  10. Annular Eclipse: Beginning, During and Ending

  11. 2012- 2013 Eclipses

  12. Lunar Eclipse: • Occurs when the Earth is positioned between the Sun and the Moon and all three bodies are in complete alignment • Occurs during the FULL Moon phase • The Earth’s shadow falls on the Moon • Lunar eclipses will be seen by everyone experiencing night

  13. The Geometry of a Lunar Eclipse

  14. 3 Types of Lunar Eclipses (But we’re only discussing Total and Partial Eclipses)

  15. West East

  16. Total Lunar Eclipse • Occurs when the entire Moon falls within the Earth’s umbra • The Moon appears reddish

  17. The Geometry of a Total Lunar Eclipse

  18. Total Lunar Eclipse

  19. Partial Lunar Eclipse • Occurs when part of the Moon falls within Earth’s umbra

  20. The Geometry of a Partial Lunar Eclipse Only a portion of the Moon falls in Earth’s umbra.

  21. Partial Lunar Eclipse

  22. Penumbral Lunar Eclipse

  23. Comparing Solar and Lunar Eclipses Differences Solar Lunar Involves the Sun, Moon and Earth Involves the Sun, Earth and Moon Requires a Full Moon Requires a New Moon Occurs at night Occurs during the day Seen by everyone experiencing night Seen over a narrow geographic area Can NEVER, EVER be looked at directly Safe to look at Similarities Both occur at 5 month, 3 week intervals Can only occur when SEM or SME are directly lined up

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