Упр.63 Unit 3 2020 ГДЗ Enjoy English 11 класс
63 Listen to the story of the discovery and check your answers. Secrets of an ancient computer Computers go back farther in history than you might imagine.
Приведем выдержку из задания из учебника Биболетова, Бабушис 11 класс, Дрофа:
63 Listen to the story of the discovery and check your answers.
Secrets of an ancient computer
Computers go back farther in history than you might imagine.
A mysterious mechanism found in a 2,000-year-old Greek shipwreck may have been used to calculate the positions of planets, predict when eclipses were to occur, and analyse other astronomical activity.
Known as the Antikythera mechanism, the device is about the size of a shoebox. When it was found underwater about 100 years ago. the mechanism was in poor shape. Its metal pieces had apparently congealed into one mass, and then had broken into pieces.
People who studied what was left of the mechanism suspected that it had something to do with astronomy. To find out more, researchers recently used advanced imaging methods, including X-ray computer tomography, to look inside the metal fragments and to check for ancient writing on the device.
The researchers discovered that the mechanism had at least 30 bronze gears with as many as 225 teeth, most likely all cut by hand.
This fresh look provided clear evidence that the device could have been used to compute eclipses of the sun and moon. A lunar eclipse occurs when the moon passes into Earthtasks shadow, and a solar eclipse occurs when the moon passes between the sun and Earth.
Scientists suspect that the mechanism was also able to show the motions of the planets. A user could pick a day in the future and. using some sort of crank, work out a planettasks position on that date.
With the added information, the researchers came up with a new model for how the mechanism operated. All these findings show that the Antikythera mechanism was perhaps 1,000 years ahead of anything else discovered from its time period.