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Eclipses lunar eclipse over DSO. Eclipses occur at new or full moon Solar Lunar.

Published byRoy Welch Modified over 9 years ago

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Presentation on theme: "Eclipses lunar eclipse over DSO. Eclipses occur at new or full moon Solar Lunar."— Presentation transcript:

1 Eclipses lunar eclipse over DSO

2 Eclipses occur at new or full moon Solar Lunar

3 Why not every full and new moon? 5 degree tilt of the Moon’s orbit means…

4 …Most new and full: shadow misses

5 Leads to eclipse seasons now: Sep-Oct/March-April ; Advances ~20days/yr due to 18.6 year nutation

6 Geometry for Lunar eclipses

7 Looking out into the shadow

8 Photo sequence through lunar eclipse

9 Moon often appears red…

10 … because of light path

11 Next lunar eclipse

12 Geometry of solar eclipses

13 Eclipse starting with partial phases

14 Safely viewing a solar eclipse

15 Almost total: diamond ring effect

16 Totality

17 Bailey’s Beads

18 Sometimes not total. Why? “Annular” eclipse

19 Moon too far away

20 Total Solar Eclipse Paths Our next good one – August, 2017 … next good one elsewhere …

21 Next solar eclipse: Turkey: the avian flue eclipse? Starts in Brazil Ends in Mongolia Russia Sahara

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