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Sun-Earth-Moon Relationships

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22 diapositives · 429 Views · Sep 03, 2014

Sun-Earth-Moon Relationships. Journey into Space Journey Museum, July 18-20, 2012 Modified from Rick Varner, AESP Goddard Space Flight Center Greenbelt, MD. Early Scientists ’ Work. Aristarchus of Samos. Too Far Away For a Ruler!. How Far Away is the Moon?. ~ 384,000 km.

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  1. Sun-Earth-Moon Relationships Journey into Space Journey Museum, July 18-20, 2012 Modified from Rick Varner, AESP Goddard Space Flight Center Greenbelt, MD

  2. Early Scientists’ Work Aristarchus of Samos

  3. Too Far Away For a Ruler! How Far Away is the Moon? ~ 384,000 km Average Distance 384,400 km (~240,000 mi)

  4. Let’s use a distance that we already know to develop our model! ~13,000 km Mathematics 384,000 km = 30 (29.54) 13,000 km Earth’s diameter = 12,756 km (rounded 13,000 km) Moon’s diameter = 3,475 km (slightly more than ¼ the of Earth)

  5. The Model The Moon is approximately one fourth the diameter of the Earth. 1” and ¼” craft beads can be used to simulate the Earth & Moon. Clipped to a yard stick 30” apart creates a mobile model that can used for both distance and eclipse simulations. Since this is a rounded measurement, the actual distance is from bead surface to bead surface.

  6. Earth to Moon Scale Modeling Variations:Age/Developmentally Appropriate Audiences Pre-existing Models: Replogle Small Lunar Globe 12” Earth Globe Athletic Balls: Basket Ball & Tennis/Baseball Ball Painting, Drawing, Clay, Play-Dough, etc… Balloons:BlueRound - Earth White Round - Moon, Red Balloon? Mathematical Models: using only numerical measurements

  7. ~24 cm 6.9 cm Diameter Approximate Scale Models Earth Moon 12,756 km 3,476 km

  8. The Phases of the Moon

  9. Moon Phase Modeling • Ping Pong Ball • Hot Glue • Long Golf Tee Glue the ping pong ball to the golf tee with the company logo covered by the top of the golf tee. If the moon is visible, hold the ball at arm’s length below the moon and compare. Rotate counterclockwise to simulate lunar phases Protect eyes from direct viewing of the sun.

  10. Ping Pong Ball Lunar Model

  11. 6/11/12 6:42am 50% Plate Activity 3 6/8/12 4:48am 77% 4 2 6/16/12 10:49am 8% The Sun is VERY far away! 6 a.m. 6/19/12 11:03am 6/4/12 12:52am 9 a.m. 3 a.m. 12 p.m. Noon 12 a.m Midnight 5 1 3 p.m. 9 p.m. 6/2/12 11:49pm 95% 6/20/12 2:04pm 1% 6 p.m. 6 8 7 1 2 3 4 5 6 7 8 http://aa.usno.navy.mil/data/docs/RS_OneDay.php

  12. Antonio Cidadao: http://www.usno.navy.mil/USNO/astronomical-applications/images_aa/Moon_movie.gif

  13. The Model Eclipses

  14. Use the sidewalk or a flat surface to align the shadows. • Look at the shadows on the background, then look at the beads. • Sun • Moon • Earth = Solar Eclipse • Sun • Earth • Moon = Lunar Eclipse

  15. August 11, 1999 Solar Eclipse viewed from Mir http://apod.nasa.gov/apod/ap990830.html

  16. May 20, 2012 Terra Spacecraft

  17. December 20, 2010 Lunar Eclipse

  18. Connecting the Lunar Phases to the Solar & Lunar Eclipse

  19. Sky & Telescope Article on 2010 Eclipses: http://www.skyandtelescope.com/observing/objects/eclipses/80386602.html

  20. http://www.mreclipse.com/Special/SEprimer.html

  21. Aug 21, 2017 Next total solar eclipse…visible in the U.S. from SC to OR http://www.mreclipse.com/Special/SEprimer.html