![]() View of Solar Eclipse and Building in Silhouette. File released into the Public Domain.Ĭlark, David. Sagredo, 2008, Geometry of a Total Solar Eclipse. File used in accordance with the Creative Commons Attribution-Share Alike 3.0 Unported license. Image is over 100 years old, and is in the Public Domain. File used in accordance with the Creative Commons Attribution-Share Alike 4.0 International license.įlocabulary, 2014. Image and video credits, in order of appearanceĪndonee, 2015. What do you see? What kind of eclipse is this? Lunar or solar? What would you see from Earth? The order should be tennis ball, marble, flashlight. What kind of eclipse is this? Lunar or solar? Does the light reach the marble?ħ.Position the marble so that it is directly in between the tennis ball and the flashlight. The order should be marble, tennis ball, flashlight. Is this a new moon or a full moon?ġ0. Rotate around one more time and identify points that you see a waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, waning crescent, and new moon.ġ.Set the toilet paper roll on the table so that it is standing upright.Ģ.Set the tennis ball on top of the toilet paper roll (picture a scoop of ice cream on a cone).ģ.Cut a piece of string (6 inches or so) and tape one end to the marble.Ĥ.Set the flashlight on the table, facing the tennis ball.Ħ.Position the marble so that it is directly in front of the tennis ball and in alignment with the flashlight. What happens to your “moon?”Ĩ.Continue rotating and observe how the light/shadows change on your “moon.”ĩ.When you are facing directly away from the flashlight, what do you see? The side of the moon facing you should be completely illuminated. Is this a new moon or a full moon?ħ.Rotate counterclockwise. What do you see? The side of the ball facing you should be completely dark. Hold it out at arm’s length.Ħ.Start facing the clamp light. Because the Earth’s and moon’s orbits are off by about five degrees and the nodes move thirty degrees clockwise each month, the moon only aligns with the nodes (thus creating eclipses) about four to seven times every year.ġ.Puncture the styrofoam ball with the popsicle stick.Ģ.The styrofoam ball represents the moon, you represent the Earth, and the clamp light represents the sun.ģ.Clamp the light onto a wall or area taller than you, and turn the clamp light on.ĥ.Grasp the stick so that the styrofoam ball is held upright. If the Earth and the moon orbited in the same plane, there WOULD be a lunar eclipse with every Full Moon and a solar eclipse with every New Moon. Why don’t lunar and solar eclipses occur with every Full and New Moon?
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