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Method to measure Earth missed by ancient Greeks?

Popular Physics 2020-07-07 v1 Physics Education History and Philosophy of Physics

Abstract

I describe a simple method to calculate Earth dimensions using only local measurements and observations. I used modern technology (a digital photo camera and Google Earth) but the exact same method can be used without any aid, with naked eye observations and distances measured by walking, and so it was perfectly accessible to Ancient Greek science.

Cite

@article{arxiv.2007.02111,
  title  = {Method to measure Earth missed by ancient Greeks?},
  author = {Fabio Falchi},
  journal= {arXiv preprint arXiv:2007.02111},
  year   = {2020}
}
R2 v1 2026-06-23T16:51:09.059Z