Measuring the Circumference of the Earth
The Goal of the Noon Day Project is to have students measure the circumference of the earth using a method that was first used by Eratosthenes over 2000 years ago.
Students at various sites around the world will measure shadows cast by a meter stick and compare their results.
From this data students will be able to calculate the circumference of the earth. Click here to get to their site and register.
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The Eratosthenes Experiment
Watch as Carl Sagan describes some of the background surrounding Eratosthenes' experiment, which is the basis for this project.
