awe and wonder a scientific, mathematical and spiritual journey presented by steve kliewer total...
TRANSCRIPT
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Awe and Wondera Scientific, Mathematical and Spiritual Journey
presented by Steve Kliewer
Total Solar EclipseCoral Sea Nov 14, 2012
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Topics
• Total Solar EclipseCoral Sea - Nov 14, 2012
• Solar Eclipse videos (5 min)
• Upcoming Attraction – Aug 2017
• The Sun-Earth-Moon System
• The Geometry of Shadows
• Lunar Rhythms
• Eclipse Features
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MS Oosterdam
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Eclipse Particulars
Nov 14, 2012 Our position in the Coral Sea was at:
S 22 18m, E 158 Totality: 2m 40s
Sunrise = Sun Altitude=291st contact: 06:50 a.m. Sydney DST = UTC+112nd contact: 07:48 a.m.3rd contact: 07:51 a.m.4th contact: 08:58 a.m.
Umbral velocity 750 m/sUmbral Diameter 160 km
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TSE2012 Mercator Animation
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Eclipse Features
• Contacts: First, Second, Third, & Fourth
• Partial Phases: Pinhole images, Cooling, Animal Behavior, color of landscape, Venus
• On the Brink: Shadow bands, Sunset colors, approaching
shadow, Bailey’s Beads, Corona?, Diamond Ring
• During Totality:
•Corona: petals to side, brushes at poles (sunspot minimum)
•Chromosphere: spiny, deep ruby red layer
•Prominences: pink flames or loops
•Stars and Planets: Mercury, Venus, Mars
Key Points
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Eclipse
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Eclipse
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Gathering Gloom
See movie
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Excitement Builds
See movie
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Total Eclipse of the Sun
http://www.nasa.gov/mission_pages/sunearth/news/eclipse-20121113.html
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Aug 21, 2017 2m 40s - Oregon to N. Carolina
See movie
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Geometry and Rhythm
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The Sun-Earth-Moon System
• Both the Sun and Moon are 1/2 in diam.
• This is the same as a dime held at 6 1/2 ft.
• Our horizon rotates 15/hr.
• The Moon moves 1 diameter / hr (2500 MPH) thru stars.
• The Moon rises 50 minutes later each day.
• The Earth moves 8 diameters / hr(65,000 MPH) around the Sun.
Key Points
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The Geometry of Shadows
• Umbra is the area of full shadow.Total Eclipse
• Penumbra is the area of partial shadow.Partial Eclipse
• Antumbra is the region beyond the Umbra. Annular Eclipse
Key Points
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To Sun
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Lunar Rhythms
• Synodic Month 29.5 days(full to full)
• Revolution Period 27.3 days
• Rotation Period 27.3 days
• Draconic Month 27.2 days(crossing the ecliptic)
• Anomalistic Month 27.6 days(closest to closest)
• Saros Cycle 18 yrs 11.32 days(223 synodic months)
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Lunar Rhythms
• Solar Eclipses require a New Moon.
• Lunar Eclipses require a Full Moon.
• The Moon’s orbit is tilted 5° (9 diameters)
• Four primary rhythms:New to New, rising and falling, in and out, & yearly seasons
• Eclipse Seasons occur every 6 lunarmonths because of the first two rhythms.
• All four rhythms repeat every 18 years.
Key Points
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Um
bra
Penum
bra
Cabo San Lucas
Mazatlan
Mexico City
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July 11, 1991
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Feb 26, 1998
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Aug 14, 1999
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Mar 29, 2006
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Nov 14, 2012