Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- Greek mathematician, astronomer, and geographer who devised a map of the world, estimated the circumference of the earth and the distance to the moon and the sun, and constructed a method for finding prime numbers.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun Greek mathematician and astronomer who estimated the circumference of the earth and the distances to the Moon and sun (276-194 BC)
Etymologies
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Examples
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Fragment #38 -- 'Eratosthenes' [1729], Catast.xix. p. 124: The
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"This range curves round towards the east, and finishes with a fine ring-plain called Eratosthenes -- some thirty-seven miles in diameter, with a floor depressed 8000 feet below the lunar surface.
To Mars via The Moon An Astronomical Story Mark Wicks
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Dan - Eratosthenes lived around 200BC, and provided the most solid empirical proof of the spherical nature of the Earth.
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Eratosthenes of Alexandria used stick shadows to measure its size to within 95 percent accuracy of today's accepted value.
Daniel Bruno Sanz: Bad Moon, Burnt Qurans, Birthers and Flat Earthers Daniel Bruno Sanz 2010
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But the idea was popularized three hundred years earlier, by Pythagoras, and it was commonly accepted by the time Eratosthenes showed up.
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Eratosthenes accurately measured the radius of the Earth by determining the minimum angle between the Sun's direction and the vertical at Alexandria on the day of the summer solstice.
Daniel Bruno Sanz: Bad Moon, Burnt Qurans, Birthers and Flat Earthers Daniel Bruno Sanz 2010
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Eratosthenes of Alexandria used stick shadows to measure its size to within 95 percent accuracy of today's accepted value.
Daniel Bruno Sanz: Bad Moon, Burnt Qurans, Birthers and Flat Earthers Daniel Bruno Sanz 2010
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Eratosthenes accurately measured the radius of the Earth by determining the minimum angle between the Sun's direction and the vertical at Alexandria on the day of the summer solstice.
Daniel Bruno Sanz: Bad Moon, Burnt Qurans, Birthers and Flat Earthers Daniel Bruno Sanz 2010
-
Eratosthenes accurately measured the radius of the Earth by determining the minimum angle between the Sun's direction and the vertical at Alexandria on the day of the summer solstice.
Daniel Bruno Sanz: Bad Moon, Burnt Qurans, Birthers and Flat Earthers Daniel Bruno Sanz 2010
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Eratosthenes of Alexandria used stick shadows to measure its size to within 95 percent accuracy of today's accepted value.
Daniel Bruno Sanz: Bad Moon, Burnt Qurans, Birthers and Flat Earthers Daniel Bruno Sanz 2010
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