Eratosthenes learned about the position of the sun by observing the angle of a shadow cast by a vertical stick in Alexandria at the same time a stick in Syene had no shadow. By measuring this angle and knowing the distance between the two cities, he was able to calculate the Earth's circumference.
Eratosthenes learned about the position of the sun on June 22 by noticing that in the city of Alexandria, a vertical stick didn't cast a shadow on that date. At the same time in Syene, a city to the south, a vertical stick did cast a shadow. By measuring the angle of the shadow at both locations, he was able to calculate the Earth's circumference.
Yes, Eratosthenes estimated the Earth's diameter using the angle of the sun's rays at two different locations on the same day. By measuring the difference in the angles, he was able to calculate the Earth's circumference and thus its diameter.
Yes, Eratosthenes had two sisters.
Aristarchus proposed the heliocentric model, suggesting that the Earth orbits the Sun, which challenged the prevailing geocentric view that the Earth was the center of the universe. Eratosthenes, through his measurements of shadows and the angle of the Sun's rays, calculated the Earth's circumference, providing evidence of its spherical shape. Together, their discoveries promoted a more accurate understanding of the Earth’s position in relation to the heavens and demonstrated that the Earth is a spherical body moving around the Sun.
Venus is the second-closest planet to the sun. The distance from the sun to Venus is 0.7233 astronomical units which is equal to 67.23 million miles.
Eratosthenes learned about the position of the sun on June 22 by noticing that in the city of Alexandria, a vertical stick didn't cast a shadow on that date. At the same time in Syene, a city to the south, a vertical stick did cast a shadow. By measuring the angle of the shadow at both locations, he was able to calculate the Earth's circumference.
Eratosthenes measured the size of Earth by using the Sun's angles, as well as a bit of geometry.
Eratosthenes (275-c. 195 B.C)
Eratosthenes was from ancient greek
Eratosthenes, It says it is Eratosthenes.
Yes, Eratosthenes had two sisters.
Yes, Eratosthenes estimated the Earth's diameter using the angle of the sun's rays at two different locations on the same day. By measuring the difference in the angles, he was able to calculate the Earth's circumference and thus its diameter.
Eratosthenes, a greek philosopher, did, hence the name.
The sieve of Eratosthenes was discovered in 223 BC.
The first one you learn is bora bor then first position then second position then fifth position then third then you will learn fourth. As you progress you will learn arabesque positions.
Eratosthenes' friend was Archimedes, he also works in Alexandria, Egypt.
Yes and his mother and father were part of the family.