Which scientist made the first accurate measurement of the earth?

Answer 1

Ancient writing indicates that Pythagoras postulated that the earth was round, and, about a hundred years later, Aristotle argued the same thing. Even before this, ancient peoples could see the round shadow of the earth on the moon during an eclipse. The thinking person could figure out why this would be so. It doesn't take a rocket scientist, and, though ancient peoples didn't have rockets or even aircraft to get a "bird's eye view" of things, they could observe and make conclusions quite well. Beyond these early ideations, both Pythagoras and Aristotle offered a "guestimate" of the earth's size, so it could be one of them. But it was Eratosthenes who got into it and make a nicely accurate calculation of the earth's circumference. It is possible that some other ancient investigators put forward some projections, but the written record, which suggests most clearly the who, what, when, where, and why of things olde, does not give us any other candidates. Use the links below to read some particulars and check things out.

Answer 2

The first successful attempt to establish the size of Earth is credited to Eratosthenes (276-194 b.c.). As shown in Figure 2, Eratosthenes observed the angles of the noonday sun in two Egyptian cities that were roughly north and south of each other-Syene (presently Aswan) and Alexandria. Finding that the angles differed by 7 degrees, or 1/50 of a complete circle, he concluded that the circumference of Earth must be 50 times the distance between these two cities. The cities were 5000 stadia apart, giving him a measurement of 250,000 stadia. Many historians believe the stadia was 157.6 meters. This would make Eratosthenes' calculation of Earth's circumference-39,400 kilometers-a measurement very close to the modern circumference of 40,075 kilometers.

Answer 3

• Eratosthenes of Cyrene,
• He is Greek scientific writer, astronomer, and poet, who made the first measurement of the size of Earth for which any details are known.
• He was born in 276 BC in Libya. He died in 194 BC in Alexandria, Egypt.

Answer 4

i don't know the spesific person but the first people to measure the size of the earth were the Greeks

Answer 5

Erathosthenes of Cyrene, about 200 BC. His estimate was off by about 15%, which is better than Ptolemy did 300 years later.

Answer 6

Eratosthenes of Cyrene ~230 BC who was a Greek scientist calculated the size, circumference of the Earth.

Answer 7

Eratosthenes