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Awe and Wonder a Scientific, Mathematical and Spiritual Journey. Total Solar Eclipse Coral Sea Nov 14, 2012. presented by Steve Kliewer. Topics. Total Solar Eclipse Coral Sea - Nov 14, 2012 Solar Eclipse videos (5 min) Upcoming Attraction – Aug 2017 The Sun-Earth-Moon System
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Awe and Wondera Scientific, Mathematical and Spiritual Journey Total Solar Eclipse Coral Sea Nov 14, 2012 presented by Steve Kliewer
Topics • Total Solar Eclipse Coral 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
Eclipse Particulars Nov 14, 2012 Our position in the Coral Sea was at: S 22 18m, E 158 Totality: 2m 40s Sunrise = Sun Altitude=29 1st contact: 06:50 a.m. Sydney DST = UTC+11 2nd contact: 07:48 a.m. 3rd contact: 07:51 a.m. 4th contact: 08:58 a.m. Umbral velocity 750 m/s Umbral Diameter 160 km
Eclipse Features Key Points • 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
Gathering Gloom See movie
Excitement Builds See movie
Total Eclipse of the Sun http://www.nasa.gov/mission_pages/sunearth/news/eclipse-20121113.html
The Sun-Earth-Moon System Key Points • 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.
The Geometry of Shadows Key Points • 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
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)
Lunar Rhythms Key Points • 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 lunar months because of the first two rhythms. • All four rhythms repeat every 18 years.
Penumbra Umbra Cabo San Lucas Mazatlan Mexico City