The moon revolves around the Earth. The earth revolves around the Sun. A natural question: and the Sun also around something rotates?
The answer to this question astronomers have only in the 20th century, and the answer is YES.
Our Sun is part of a huge star system, which is called the Galaxy (it is also called the milky Way). Our galaxy is in the form of a disk, similar to the two folded edges of the plates. At its center is rounded nucleus of the Galaxy.
Our Galaxy - side view
If you look at our Galaxy from above, it looks like a spiral, in which the stellar matter is concentrated mainly in its branches, called galactic sleeves. Sleeves are in the plane of the Galaxy disk.
Our Galaxy is a top view of
Our Galaxy contains more than 100 billion stars. The diameter of the disk of the Galaxy is about 30 thousand parsecs (100,000 light years)[?], and a thickness of about 1000 light years.
Stars inside the disk move in circular paths around the center of the Galaxy, just as the planets in the Solar system revolve around the Sun. The rotation of the Galaxy is clockwise when looking at the Galaxy from its North pole (located in the constellation coma). The rotation speed of the disk is not the same at different distances from the centre: it decreases as the distance from it.
The closer to the center of the Galaxy, the higher density of stars. If we lived on a planet around a star near the nucleus of the Galaxy, the sky would be visible to dozens of stars, the brightness is comparable to the Moon.
However, the Sun is very far from the center of the Galaxy, we can say its edge, at a distance of about 26 thousand light years (8.5 thousand parsecs), near the plane of the galaxy. It is located in the sleeve of Orion, which is connected with the two larger sleeves - inner sleeve of Sagittarius and the outer Sleeve of Perseus.
The position of the Sun in the Galaxy, side view
The sun is moving at a speed of about 220 to 250 kilometers per second around the center of the Galaxy and makes a full rotation around its center, according to various estimates, at 220-250 million years. During its existence, the Period of revolution of the Sun, along with the surrounding stars near the center of our star system is called a galactic year. But we must understand that the total period for Galaxy no, because it rotates as a rigid body. The sun during its existence traveled around the Galaxy about 30 times.
The circulation of the Sun around the Galactic centre is oscillatory in nature: every 33 million years it crosses the galactic equator, then rises above its plane to a height of 230 light years away and falls back down to the equator.
Interestingly, the Sun makes a complete revolution around the Galactic centre at exactly the same time as the spiral arm. In the result, the Sun does not intersect the region of active star formation, which often erupt supernova - sources of fatal radiation. That is, it is in the sector of the Galaxy, the most favorable for the emergence and maintenance of life.
By the way...
The most inquisitive howcast probably will not stop there and say, "our Galaxy also rotates around a center?"
And again the answer is Yes.