Rotation (-zhuàn): a form of mechanical motion. Objects to the body in a straight line axis of rotation. Sun and planets, satellites for most of the rotation from west to east (from east to west a few for the rotation, such as Venus, etc.). Many stars, even the Milky Way and Hewaixingxi (part of) have rotation.
Translated by Google
No. 2
Astronomy terms. Where the planets rotate around its own axis, that of the rotation. Earth's rotation week is 23 hours 56 minutes 4 seconds; the moon's rotation around the week it is saying the Earth to the same week, is 27 days 7 hours 43 minutes 11.5 seconds.
Translated by Google
zì zhuàn
Stars around their own axis rotation
Translated by Google
No. 4
Revolution has a lot of rotation of both objects
Translated by Google
Self-rotation
Self-rotation. "Later Han Heng Biography": "Participation wheel can spin, wood can still fly alone." Southern Liang Xie, "the fixed Wen Xin Diao Long": "Round by regulatory body, the force also rotation; side are rectangular, also from the safety of its potential; article body potential, this predicament it. "
Translated by Google
No. 6
Rotation: zì zhuàn 1 self-rotation. (2) astronomy terms. Where the satellites, planets, stars, galaxies rotate around its own axis, that of the rotation. Earth's rotation week is 23 hours 56 minutes 4 seconds; the time it is saying the moon rotates around the Earth to the same week, are 27 days 7 hours 43 minutes 11.5 seconds. Earth's solar system with eight other planets, as in around the sun at the same time. Around an imaginary axis of rotation is constantly turning, which is the Earth's rotation. Hundreds of years ago, people made a lot of ways to prove the Earth's rotation, the famous "Foucault pendulum" so we really see the Earth's rotation, however, why the Earth's rotation around the axis? Why turn it around the sun? This is a great many years that scientists have been interested in the problem, it seems rough, all the universe, celestial rotation is a basic form of exercise, but to really answer this question, we must first figure out how the Earth and solar system formation . Earth's rotation and revolution of the generation and the formation of the solar system are closely related. Theory of modern astronomy, the solar system was formed by the so-called primitive nebula, the original nebula is a large very thin cloud of gas and 50 billion years ago by the impact of a disturbance in gravity to the center under contract. After a long period of evolution, the central part of the density of the material increases, increasingly high temperatures, can lead to thermonuclear reaction and finally to the extent, and evolved into the sun. The residual gas surrounding the sun is gradually formed a rotating disk-shaped gas layer, after contraction, collision, capture, accumulation and other processes in the gas layer gradually gathered into solid particles, micro-planets, the original planet, and finally the formation of a separate planets and asteroids and other solar system bodies. The original formation of the solar system with angular momentum on the original nebula, and planets in the solar system formed, after which the angular momentum is not lost, but the inevitable re-distribution of all stars in the long process of accumulation of substances were obtained from the original nebula a certain amount of angular momentum. As the conservation of angular momentum, the speed of the planet in the process of contraction will be faster. Earth is no exception, it gets the main distribution of angular momentum in the Earth's revolution around the sun, each orbiting the Earth-Moon system and Earth's rotation, which is the origin of Earth's rotation, but to really analyze the Earth and the other major planets the revolution movement and rotation movement also need scientists to do a lot of research work. This means that, in the Earth's formation, movement - in particular, refers to the rotation, from beginning to end with the formation of Earth, rather than the formation of the earth for some reason after the next start in the rotation or revolution of.
Translated by Google
Term
Self-rotation.
Translated by Google
Astronomy Terms
Rotation is the rotation movement of the object itself, the object will pass through the body parts along an axis of rotation itself, this axis is called "axis of rotation." In general, the axis of rotation will pass through the center of mass of celestial bodies. Where the satellites, planets, stars, galaxies rotate around its own axis, that of the rotation. Earth's rotation week is 23 hours 56 minutes 4 seconds; the time it is saying the moon rotates around the Earth to the same week, are 27 days 7 hours 43 minutes 11.5 seconds. Earth's rotation axis and the ecliptic into the 66.34-degree angle. Rotating sphere along the axis of rotation Earth's solar system with eight other planets, as in around the sun at the same time. Around an imaginary axis of rotation is constantly turning, which is the Earth's rotation. Hundreds of years ago, people made a lot of ways to prove the Earth's rotation, the famous "Foucault pendulum" so we really see the Earth's rotation, however, why the Earth's rotation around the axis? Why turn it around the sun? This is a great many years that scientists have been interested in the problem, it seems rough, all the universe, celestial rotation is a basic form of exercise, but to really answer this question, we must first figure out how the Earth and solar system formation . Earth's rotation and revolution of the generation and the formation of the solar system are closely related. Theory of modern astronomy, the solar system was formed by the so-called primitive nebula, the original nebula is a large very thin cloud of gas and 50 billion years ago by the impact of a disturbance in gravity to the center under contract. After a long period of evolution, the central part of the density of the material increases, increasingly high temperatures, can lead to thermonuclear reaction and finally to the extent, and evolved into the sun. The residual gas surrounding the sun is gradually formed a rotating disk-shaped gas layer, after contraction, collision, capture, accumulation and other processes in the gas layer gradually gathered into solid particles, micro-planets, the original planet, and finally the formation of a separate planets and asteroids and other solar system bodies. The original formation of the solar system with angular momentum on the original nebula, and planets in the solar system formed, after which the angular momentum is not lost, but the inevitable re-distribution of all stars in the long process of accumulation of substances were obtained from the original nebula a certain amount of angular momentum. As the conservation of angular momentum, the planets in the contraction speed of the process will be faster. Earth is no exception, it gets the main distribution of angular momentum in the Earth's revolution around the sun, each orbiting the Earth-Moon system and Earth's rotation, which is the origin of Earth's rotation, but to really analyze the Earth and the other major planets the revolution movement and rotation movement also need scientists to do a lot of research work. This means that, in the Earth's formation, movement - in particular, refers to the rotation, from beginning to end with the formation of Earth, rather than the formation of the earth for some reason after the next start in the rotation or revolution of.