Awe and Wondera Scientific, Mathematical and Spiritual Journey
presented by Steve Kliewer
Total Solar EclipseCoral Sea Nov 14, 2012
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
MS Oosterdam
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
TSE2012 Mercator Animation
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
Eclipse
Eclipse
Gathering Gloom
See movie
Excitement Builds
See movie
Total Eclipse of the Sun
http://www.nasa.gov/mission_pages/sunearth/news/eclipse-20121113.html
Aug 21, 2017 2m 40s - Oregon to N. Carolina
See movie
Geometry and Rhythm
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
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
To Sun
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
• 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
Um
bra
Penum
bra
Cabo San Lucas
Mazatlan
Mexico City
July 11, 1991
Feb 26, 1998
Aug 14, 1999
Mar 29, 2006
Nov 14, 2012