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Professor Dave Explains
History of Astronomy Part 2: Early Measurements of the Earth
After many centuries of pure observation, it finally became time for mankind to start doing some science to figure out the dimensions of the Earth and other nearby objects. What were these early experiments? What did they tell us? Let's...
Center for Innovation in Engineering and Science Education, Stevens Institute of Technology
Ciese Collaborative Projects: Noon Day Project
The Noon Day Project is a collaborative internet project for students to recreate Eratosthenes first measurement of the Earth's north-south circumference. Participate in the next project session, or review the data presented in the...