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i need a picture of what the proportion should look like

2006-10-22 15:09:33 · 2 answers · asked by thetorminator93 1 in Science & Mathematics Earth Sciences & Geology

2 answers

Hi. Don't have a picture but I'm sure it's on the web. Quite simply, he noticed that, on a particular day of the year in a particular city, a stick stuck perpendicular in the ground cast no shadow. In another city south of the first on the SAME day a stick WOULD cast a shadow. He measure the angle, measured the distance to the city, and calculated a diameter for the Earth at 25,000 miles. This is darn close. He then observed that during a lunar eclipse, the radius of the shadow of Earth was larger than the diameter of Earth and calculated the Moon's diameter. Again pretty well. Based on this he calculated the distance to the Moon.

2006-10-22 15:14:45 · answer #1 · answered by Cirric 7 · 1 0

Erathostenes' method to measure the circumference of the earth.

The picture is at the below link.

2006-10-22 22:15:26 · answer #2 · answered by voidedius 3 · 1 0

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