1. Первое приблизительное определен

1. Первое приблизительное определение размеров земного шара более 2 тыс. лет назад сделал древнегреческий ученый, хранитель Александрийской библиотеки Эратосфен Киренский..
2. Он заметил, что в городе Сиене (современный Асуан), расположенном к югу от Александрии, 22 июня полуденное Солнце освещает дно самых глубоких колодцев, а в Александрии в этот же день солнце в полдень не доходит до зенита и предметы дают тень.
3. Измерив, насколько полуденное солнце в Александрии отклонено от зенита, он получил величину, равную 7° 12', что составило 1/50 окружности. Из чего он справедливо заключил, что Сиена отстоит от Александрии на 1/50 окружности Земли.
4. Для вычисления длины окружности земного шара оставалось измерить расстояние между Александрией и Сиеной, а затем умножить его на 50.
5. Единственным доступным Эратосфену «прибором» для измерения такой большой дистанции был верблюжий караван.
6. Зная, сколько времени верблюды тратят на переход от Александрии до Сиены, ученый определил, что эти города отстоят друг от друга на расстоянии 5000 египетских стадий (около 800 км).
7. Окружность же всей планеты в 50 раз больше , она равна примерно 40 тыс. км.
8. Теперь Эратосфен мог без труда вычислить радиус Земли — согласно его расчетам, радиус Земли оказался равным 6311 км.
9. Это явилось первым и довольно точным представлением о размерах нашей планеты.

Результаты (английский) 1:

1. the first approximate determination of the size of the globe more than 2 thousand. years ago did the ancient Greek scientist, keeper of the library of Alexandria, Eratosthenes of Cyrene.
2. He noticed, that in Syene (modern Aswan), located south of Alexandria, 22 June midday sun illuminates the bottom of the deepest wells, and in Alexandria, on the same day, the Sun at noon does not reach the zenith and the items give a shadow.
3. By measuring how much the midday sun in Alexandria declined from Zenith, he received an amount equal to 7° 12 ' that was 1/50 of a circle. What he rightly concluded that Siena is from Alexandria on 1/50 Land circumference.
4. To calculate the circumference of the globe had to measure the distance between Alexandria and Siena, and then multiply it by 50.
5. The only available Èratosfenu "device" to measure such a great distance was a camel Caravan.
6. Knowing how much time they spend on the transition from Alexandria to Siena, a scholar determined that these cities apart from each other at a distance of 5000 Egyptian stages (about 800 km).
7. Circle the entire planet in 50 times more, it is about 40 thousand. km.
8. Now He could easily calculate the radius of the Earth — according to his calculations, the Earth's RADIUS is equal to 6311 km.
9. This was the first and is quite an accurate representation of our planet.

Результаты (английский) 2:

1. The first approximate sizing of the globe more than 2 thousand years ago did the ancient Greek scholar, curator of the Library of Alexandria Eratosthenes of Cyrene ..
2. He noted that in Siena (modern Aswan), located south of Alexandria, June 22 midday sun illuminates the bottom of the deepest wells, and in Alexandria on the same day in the midday sun does not reach its zenith and objects provide shade.
3. Measuring how midday sun in Alexandria declined from the zenith, he received an amount equal to 7 ° 12 ', which amounted to 1/50 of a circle. From what he rightly concluded that Siena is separated from Alexandria on 1/50 Earth's circumference.
4. To calculate the circumference of the globe had to measure the distance between Alexandria and Siena, and then multiply it by 50.
5. The only available Eratosthenes "instrument" for measuring distance was such a big caravan.
6. Knowing how much time to spend on camels crossing from Alexandria to Siena, a scientist has determined that these cities are spaced at a distance of 5,000 Egyptian stages (about 800 km).
7. Same circumference of the planet 50 times, it is about 40 thousand kilometers.
8. Eratosthenes could now easily calculate the radius of the Earth - according to his calculations, the radius of the earth was found to be 6311 km.
9. This was the first and fairly accurate idea of the size of our planet.

Результаты (английский) 3:

1. The first estimated the specification of the size of the world's more than 2 thousand years ago made a Greek scholar, custodian Alexandria Library Эратосфен special accent.
2. He observed,That is in the city Siena (modern Aswan), which is located to the south of Alexandria, 22 June largely unregulated industry where training the Sun illuminates the bottom of the most deep-wells,And in Alexandria on the same day the sun at noon does not reach the zenith and objects give a shadow.
3. By measuring how much the sun largely unregulated industry where training in Alexandria rejected from zenith, he received a value that is equal to 7° 12 ',That was 1/50 circumference. From what he has rightly concluded that Siena is separated from Alexandria to 1/50 circumference of Earth.
4.To calculate the length circumference of the globe remained measure the distance between Alexandria and Tavarnelle Val di Pesa, and then multiply it by 50.
5.The only available Эратосфену "tool" to measure such a large distance was yourself at Karavan.
6. Knowing how much time birds spend on transition from Alexandria to Siena, the scientist has identified,That these cities are evenly spaced from each other at a distance 5000 Egyptian stage (approximately 800 km).
7. The circle same throughout the planet in 50 times more , it is equal to approximately 40 thousand km.
8.Now Эратосфен could easily calculate the radius of Earth, according to his calculations, the radius of Earth is equal to 6311 km).
9. This was the first and is quite an accurate representation of the size our planet.