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Anonymous users2024-02-11According to the "Kant-Laplace nebula theory", the solar system evolved from a rotating nebula, and the nebula material first formed the sun, and then formed the planets including the earth and other celestial bodies, the nebula is rotating, so the planets revolve around the sun in a certain orbit, and the orbit is the same as the sun's rotation, as for why it is elliptical, the earth's state of motion is unstable, and it is always changing in order to maintain a relatively stable orbit, so it cannot be circular.
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Anonymous users2024-02-10No matter what star the Earth revolves around, that star will be called the Sun.
Why is the Earth not drawn together by the sun, but revolves around it?
Because the earth has speed.
Why is the orbit of rotation not circular, but elliptical?
It is difficult to maintain a circular orbit, and the surrounding celestial bodies will affect the orbit of the Earth.
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Anonymous users2024-02-09Because the volume of the sun occupies the largest mass of the solar system, the gravitational pull is also the largest.
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Anonymous users2024-02-08The other stars are too far away, so it's better to find the nearest one.
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Anonymous users2024-02-07Because he is next to the earth.
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Anonymous users2024-02-06Because Earth is curious and wants to see what the hell is going on with this fireball!
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Anonymous users2024-02-05Why do you have to walk with your feet, you can't walk with your hands all the time?
The main building asked a question about raising the bar.
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Anonymous users2024-02-04Why are you your parent's child and not someone else's.
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Anonymous users2024-02-03That's right, the moon revolves around the earth, and the earth revolves around the sun. The Moon revolves around the Earth because the mass of the Earth is much greater than that of the Moon, and the distance from the Moon to the Earth places the Moon within the gravitational range of the Earth.
Although the Sun is massive, the Sun's gravitational pull on it is much smaller than that of the Earth because the Moon is too far away from the Sun and has too little mass. The Moon rotates while revolving around the Earth, and the period day is exactly a sidereal month, so we can't see the far side of the Moon. This phenomenon is called "synchronous rotation", or "tide locking", and is almost a universal law in the world of solar system satellites.
The Earth revolves around the Sun**
The mass of the Sun is much greater than that of the Earth (about 330,000 times that of the Earth), and the Sun-Earth distance puts the Earth within the gravitational range of the Sun (the distance is not too close and not too far, too close the Earth will crash into the Sun, too far away it will leave the solar system).
The basic way in which the celestial bodies of the universe move between each other follows Newton's law of universal gravitation. Objects with small masses are attracted by objects with large masses, and the distance between the two determines whether the small objects are within the gravitational range of the larger bodies.
When the distance is appropriate (too close, the small celestial body will collide with the large celestial body, too far away, the small celestial body will fly away from the large celestial body), the small celestial body will make elliptical motion around the large celestial body, and the centrifugal force and attraction generated by the elliptical motion reach dynamic equilibrium.
First of all, it is stated that, if only from the kinematic point of view, who revolves around whom is only a question of frame of reference, and does not involve a question of principle. >>>More
In fact, strictly speaking, the Earth does not revolve around the Sun, but around the center of mass of the system that the Earth and the Sun make up (if the influence of other celestial bodies is not taken into account). This is because the effect of gravity is concentrated in this point, which means that the earth seems to be attracted to this one point. After studying high school physics, I know that in this case, as long as the initial velocity is not towards this center of mass (the earth is obviously not moving towards this center, the lucky one) will make a uniform circular or elliptical motion, in fact, the real circular motion does not exist, because there is resistance, its speed will continue to decrease, of course, this decrease is very small on the earth, otherwise we would have been baked. >>>More
This is the gravitational force that Newton discovered.
This attraction exists between any two objects. This attraction between objects is prevalent between all things in the universe and is called gravitational force. >>>More
Yes, frictionless motion does not require force to maintain, so the revolution of the earth has nothing to do with the sun. Assuming that the gravitational pull of the Sun could cause the Earth to accelerate from a standstill, the Earth would have to continue to accelerate, not as it does now. If it really all started at rest, there would be only the sun left in the solar system, because everything fell into it. >>>More
When the earth revolves around the sun, the sun is attractive to the earth (in fact, it is mutual, because the earth is too small to obey the sun), and at the same time it produces a centrifugal force to get rid of the sun, the magnitude of the centrifugal force is proportional to the speed of rotation, fortunately the centrifugal force generated by the earth revolving around the sun, is exactly equal to the attraction of the sun to the earth, the earth will not get rid of the sun, nor will it hit it, since there is no resistance in space, the speed of the earth and the distance between the sun will always remain the same.