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What are the contribution of aristarchus?
Postulated that the Earth is curved and calculated the circumference of the Earth to within 1% of accuracy, simply by using shadows and geometry; then placed the sun at the center of the then known solar system - known as the heliocentric universe.
Who calculated the size of earth?
The Greek mathematician and astronomer Eratosthenes is credited for calculating the Earth's circumference around 240 BC. He did so by comparing the angle of the shadow cast by a vertical stick at noon in two different cities and using basic trigonometry to estimate the Earth's size.
If the circumference of a circle with a radius of 3.2 cm?
The circumference of a circle when the diameter is 30 is: 94.25
How radius of earth was calculated?
Greek scholar and philosopher Eratosthenes (276 BC - 195 BC) figured out that the length of the shadow at exactly noon, drawn from a stick of a certain length, stuck in the ground in Aswan, Egypt, was of a different length than the shadow at exactly noon, drawn from a similar stick in Alexandria, Egypt. From this, the circumference of the Earth was calculated, and the diameter and radius soon followed. See the related link listed below for more information:
What is the circumference of the top of a plastic cup?
The circumference of the top of a plastic cup is the distance around its circular opening. This can be calculated using the formula: Circumference = π x diameter. Simply measure the diameter of the top of the cup and multiply it by π (approximately 3.14) to find the circumference.
The Greek geographer mathematician astronomer and poet who calculated the circumference of Earth was?
Eratosthenes
Where did eratosthenes made discoveries?
Math. Calculated earth's circumference at various latitudes. Geography.
Who was eratosthenes what did he find by his calculations?
THE EARLIEST KNOWN MEASUREMENTS WERE CALCULATED IN 200 BCE THE GREEK PHILOSOPHER ERATOSTHENES ACCORDING TO HIS CALCULATIONS THE CIRCUMFERENCE OF the earthWAS 39,600 KM....
What are facts on Eratosthenes?
Eratosthenes was a Greek mathematician and astronomer, named chief of the Library of Alexandria. He is recognized as the first person that calculated the circumference of Earth, he did it by his own rudimentary means and the results were quite accurate.
Ertaosthenes determined the circumference of earth by conducting an experiment what are the steps?
Eratosthenes calculated the Earth's circumference by measuring shadows at two different locations at the same time. He then used the angles of the shadows cast by a vertical stick to calculate the Earth's circumference using geometry and trigonometry. By comparing the shadow angles at two different locations, Eratosthenes was able to estimate the Earth's size accurately.
Who first accurately calculated the circumference of the Earth?
Eratothsenes Follow the link to his very cool projectThe Ancient Greeks - and they got it right, which was more than Columbus did!The Greek mathematician Eratosthenes calculated the circumference of the Earth fairly accurately over 2300 years ago!Eratosthenes was the first person to do this. He measured the distance netween two points and the different angles mad by the Sun - and worked out from these. His result was surprisingly accurate.
Why is eratosthenes famous?
He calculated the circumference of the world without ever leaving Egypt. He also invented longitude and latitude, and made a map of the known world incorporating parallels and meridians.
When was the the circumference of the Earth first measured and by who?
One possible person is Eratosthenes of Cyrene ~230 BC as he was a Greek scientist who calculated the circumference of the Earth, with remarkable accuracy (some values for the "stadia" he used gives a result within 6% of the actual polar circumference). See link for further information
How long did Eratosthenes live?
Eratosthenes was a Greek astronomer and mathematician, he is considered the inventor of geography. In fact, he is credited as the first one that calculated the earth's circumference. He was born in the year 276 BC and died in the year 195 or 194 BC, thus, he lived 80 or 81 years.
Eratosthenes determined the circumference of the earth by conducting an experince put his step in order as they correlate to the scientific to the method?
Certainly! Eratosthenes estimated the Earth's circumference by comparing the angles of the sun's shadow at two different locations and using the distance between them. By measuring the shadows cast by objects, he calculated the angle of the sun's rays at each location, leading to an accurate estimate of the Earth's size, which was remarkably close to the current value.
The astronomer eratosthenes determined that?
That the earth was round, and calculated it's circumference to be 24,675 miles, relatively close to the actual figure. To add to that, the actual figure is 24,901.55 miles (40,075.16 kilometers) at the equator, but shorter from pole to pole, 24,859.82 miles (40,008 km). This is because the earth is not exactly round, but has the shape of oblate spheroid, or ellipsoid, or more properly, geoid (earth-like).
What scientist found Earth was round?
Greek mathematician and astronomer, Eratosthenes, is credited with determining that the Earth is spherical. In the 3rd century BCE, he calculated the Earth's circumference using the angle of the sun's rays at two different locations.
