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

13. DateEclipseType May 20, 2012SolarAnnular June 4, 2012LunarPartial November 13, 2012SolarTotal November 28, 2012LunarPenumbral April 25, 2013LunarPartial May 10, 2013SolarAnnular May 25, 2013LunarPenumbral October 18, 2013LunarPenumbral November 3, 2013SolarHybrid (?) 2012- 2013 Eclipses

14. 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

15. The Geometry of a Lunar Eclipse

16. 3 Types of Lunar Eclipses (But we’re only discussing Total and Partial Eclipses)

18. West East

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

20. The Geometry of a Total Lunar Eclipse

21. Total Lunar Eclipse

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

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

25. Partial Lunar Eclipse

26. Penumbral Lunar Eclipse

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