Smithsonian National Air and Space Museum | Circumference of Earth @airandspace | Uploaded October 2023 | Updated October 2024, 15 minutes ago.
About two thousand years ago, a Greek scholar named Eratosthenes used some sticks, shadows and math to calculate the circumference of the Earth. We enlisted friends in Hawaii and Missouri to help us recreate Eratosthenes’ experiment. In this video you’ll see how we took advantage of Lahaina Noon in order to measure and calculate the size of our home planet.

This “clip” is part of the STEM in 30 episode: How big is BIG?: The Scale of the Universe : youtu.be/jIu7_SNVmd0

For more information about how to use this resource in your classroom please visit our Teacher Tips page that includes standards, classroom activities, and additional resources.
How Big is Big: Teacher Tips - bit.ly/46IaOZv

STEM in 30 is a free educational series for kids produced by the Smithsonian's National Air and Space Museum. We cover all the cool, fun, and weird ways that aviation and spaceflight touch our lives. Check out more episodes: https://airandspace.si.edu/stem-30

Follow STEM in 30 on Facebook: facebook.com/STEMin30
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This episode is made possible by the generous support of Boeing, Hexcel and Safran

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