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21 Jun 240 Jahr v. Chr. - Measuring the Circumference of the Earth

Beschreibung:

The achievement that Eratosthenes was best know for was measuring the circumference of the earth. He did this by using 2 shadows (A well and a pole) in Syene (now know as Aswan) and Alexandria. It is believed that he did this in 240 BC based on an astronomer named Cleomedes crediting him with doing it. We also know that he calculated the circumference between June 20 - 22 because that is the summer solstice which means the sun would be directly above the well.

Zugefügt zum Band der Zeit:

Scientists and Inventors and Their Discovers or Inventions W.I.P.

BySaul Goodman
8 Jan 2019
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593

Datum:

21 Jun 240 Jahr v. Chr.
Jetzt
~ 2267 years ago

Abbildungen:

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