Tag Archives: Eratosthenes

Eratosthenes the Excellent??

Posted on February 20, 2022 by alexlitt

Newton, Kepler, Galileo, Copernicus… Eratosthenes?? The name Eratosthenes is not as universally renowned, or even as known, as the likes of Newton or Galileo.; however, his contributions are just as exceptional. More than 2200 years ago, around 240 B.C.E, Eratosthenes correctly measured the circumference of the Earth to within 5% of its correct value. Considering […] Continue reading →

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Eratosthenes Measures the Earth

Posted on February 12, 2014 by jblubin

How do you measure the circumference of the Earth? It’s not like you can take out a meter stick and lay it end to end hundreds of thousands of times. Today with satellite technology and GPS we can easily complete this task and get an extremely precise answer: 40,075.017 kilometers. But how might a Greek … Continue reading Eratosthenes Measures the Earth → Continue reading →

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