Why does the starry sky rotate, but the North Star is stationary? Detailed answer

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Why does the starry sky rotate, but the North Star is stationary? Detailed answer

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Why does the starry sky rotate, but the North Star is stationary?

The reason for the apparent movement of the stars is the rotation of the Earth. Just as a person whirling in a room imagines that the whole room is spinning around him, so we, who are on the rotating Earth, seem to see moving stars.

Our Earth has an axis - an imaginary line around which the globe rotates. The axis of rotation of the Earth crosses the earth's surface at two points - these are the North and South geographic poles. If the direction of the earth's axis is continued, then it will pass near the North Star. This is why the North Star appears to be stationary and the celestial sphere appears to rotate around an imaginary axis.

Author: Cellarius E.Yu.

Random interesting fact from the Great Encyclopedia:

Why are some of Euler's discoveries named after other scientists?

Leonhard Euler made a huge number of discoveries. A large number of physical and mathematical objects are named in his honor, and more than once: there are several Euler formulas, Euler equations, Euler theorems, Euler numbers. To avoid too much ambiguity, some of these discoveries and theorems are named after the scientists who first made or proved them after Euler.

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Random news from the Archive

Supercomputer successfully imitates communication with a teenager 14.06.2014

In 1950, the English mathematician and cryptographer Alan Turing, who made a significant contribution to the development of computer science, proposed a test, which later became known as his name.

The test allows you to determine whether the computer is able to "think". It is built on the interaction of the presenter with another person and a computer. At the same time, none of the test participants sees each other, and the interaction takes place in text form with the issuance of messages at regular intervals.

The task of the presenter (judge) is to determine which of his interlocutors is a computer and which is a person. If the choice was made incorrectly, that is, the computer program managed to impersonate a person, we can conclude that the computer is able to imitate the results of mental activity.

This happened at the University of Reading in England at the Turing Test 2014 Prize organized by the Royal Society, which involved five supercomputers. The computer program of Russian Vladimir Veselov and Evgeny Demchenko managed to convince 33% of the judges within a five-minute conversation that she was a 13-year-old boy, Eugene Goostman.

Note that since 1990, the AI Loebner competition has been held annually, in which programs also compete in passing the Turing test. The winner is the program that most realistically imitates a person, and its developers receive a cash prize of several thousand dollars. There is a $25 reward for a program that passes the Turing test, but no prize has been awarded in all these years. It should also be clarified that in the case of the Turing Test 2014 Prize, there were no restrictions on the topics of communication and the topics were not known in advance.

Of course, one should not expect useful practical applications from the Eugene program. The task of such projects is to confirm the possibility of creating artificial intelligence and stimulate interest in developments.

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