# The movement of the Sun

Is there a movement of the sun? Many amateur astronomers have learned well the heliocentric system of the world and rightly say that all of the planets and the Earth revolve around the Sun, but at the same time do the following, already an invalid, a logical step, as if its movement while absent. The sun is freely moving in the space of the body, and under the influence of the gravitational influence of other bodies, there are several movements of the sun. Its movements and planets on the celestial sphere represent only their visible movement. Thus, any movement of the stars on the celestial sphere are not related to the daily rotation of the Earth.

Firstly, the movement of the sun around its axis. Secondly, as a member of the solar system, as well as all the other planets, there is a movement of the Sun around a common center of mass. The main "counterbalance" the Sun is Jupiter, which is only 1047 times easier. Accordingly, the radius of the orbit of the Sun's motion will be the same factor less than: 740x103 km. Incidentally, it is larger than the radius of the Sun! Movement of the Sun happens to the orbital speed of 12,5 m/s, which means that even on a decent bike (45 km/h) is already quite possible to "compete" with the Sun speed! By the way, in this way, by measuring the variations of the radial velocity (ie. the gravitational influence) since 1995 discover planets in other stars, and more than 60 pieces opened.

Third, there is a movement of the Sun and relative to other stars. For the first time it came out the work of William Herschel "On own movement of the Sun" in 1783, in which it is analyzing the apparent proper motions few close stars, concluded that the movement of the Sun and the solar system is in the direction of the constellation Hercules. It has its own speed of 19,7 km/s. This rate is higher than that of Jupiter, and roughly corresponds to an orbital velocity of asteroids. The sun moves almost uniformly in a large circle of the celestial sphere, called ecliptic, from east to west, making a complete revolution per sidereal year (365,2564 days).

Finally, fourthly, there is a movement of the sun with all the other stars and the rotation of our galaxy. According to recent data, at a distance of 8,5 kpc from the galactic center, the sun revolves around it at a speed of 204 km/s and makes one revolution in about 255 million years.