How are solar eclipses possible when the moon is around one-quarter the size of Earth and our sun is about 109 times the diameter of Earth?
How can the small moon block out the giant sun?
In this NASA Goddard video, Susannah Darling explains how solar eclipses work, despite these size differences.
To do this activity, get a paper plate and a coin, or try it with any two objects of similar shape. Darling explains:
“Secure the larger circle either by having a friend hold onto it for you, or by using a little bit of tape. Now… take the smaller circle and hold it at arm’s length, and close one eye. See if it overlaps the larger circle.
“If it doesn’t, take a few more steps back and try again until the smaller circle completely overlaps the larger circle.”
Next, learn more with these videos on TKSST:
• The 2017 Solar Eclipse from the shores of Palisades Reservoir, Idaho
• How to watch a total or partial solar eclipse
• The science of solar eclipses: How do solar & lunar eclipses work?
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