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The Great American Eclipse August 21, 2017

The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

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Page 1: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

The Great American EclipseAugust 21, 2017

Page 2: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC
Page 3: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

Tourist Population Predictions

• Yikes! Everybody hide!!

Page 4: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

Viewing the Eclipse Safely

• Eclipse Glasses• Welding Glasses: Number 14• Projections• Solar Filters

Page 5: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

Types of Solar Eclipses

• Total• Partial• Annular

Page 6: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

How can the Small Moon cover the Big Sun?

• Moon’s Diameter: 2,159 miles• Sun’s Diameter: 864,576 miles

Page 7: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC
Page 8: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

Earth, Moon, Sun System

Page 9: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

Lunar Phases

• Can the Moon be seen during the day?

Page 10: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

Solar andLunar Eclipses

Page 11: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC
Page 12: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

Future Solar Eclipses

Page 13: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC
Page 14: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

Earth, Moon Scale

• Size• Distance

Page 15: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

• Earth’s Diameter• 7,917 miles

• Moon’s Diameter• 2,159 miles

Page 16: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

Average Distance: 238,900 miles (30 Earth Diameters)

Page 17: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC
Page 18: The Great American Eclipse · 2009 Jul 22 09 2012 1 s w 04 1800 E 07 W w Total Eclipse Annular Eclipse Hybrid Eclipse 1503 E 2000 4000 6000 8000 10000 Kilometers Fred Espenak, NASA/GSFC

Resources that we used in this workshop can be purchased here:

• The Universe at You Fingertips DVD-ROM• https://myasp.astrosociety.org/product/DV122/theuniverseatyourfingertips2

0dvdrom.php

• Eclipse Glasses• Rainbow Symphony: https://www.rainbowsymphony.com/eclipse-glasses/• American Paper Optics: http://www.eclipseglasses.com/

• Solar Filter Paper• https://www.optcorp.com/catalogsearch/result/?q=solar+film+sheet+250mm

+x+500mm+visual&order=relevance&dir=desc