The orbit of a planet and the earth around the sun can be regarded as a circle. Every n years, the planet will move to the extension line of the sun earth line. The ratio of the radius of the planet and the earth is (n / n-1) ^ 2 / 3 Why can't the earth rotate one more circle, two or three more than the planet, as long as it's an integral circle

The orbit of a planet and the earth around the sun can be regarded as a circle. Every n years, the planet will move to the extension line of the sun earth line. The ratio of the radius of the planet and the earth is (n / n-1) ^ 2 / 3 Why can't the earth rotate one more circle, two or three more than the planet, as long as it's an integral circle


It's good to have such rigorous logic, but when the owner arrives at the University, he will find that it's a standard word
In other words, "every day, the sun will rise in the East." after listening to this sentence, everyone will understand that the sun rises in the East once a day, right? If we follow the careful questions in our daily life conversation, will it be very difficult?
University has graduated, some things in high school are worthy of lifelong memory, and some things need to be sublated. For the sake of college entrance examination, you can temporarily submit to such rules. But if you are blinded by the broader celestial body between the lines, it is not worth the loss



If the orbit radius of an asteroid moving uniformly around the sun is four times the radius of the earth's revolution, then the speed of the asteroid is twice that of the earth______ Times


According to the centripetal force provided by universal gravitation, we get: v = GMR; because the asteroid and the earth do uniform circular motion around the sun, so the value of GM is the same; the orbit radius of the asteroid is four times of the earth's revolution radius, let the earth radius r, the asteroid radius 4R, and substitute v = GMR to get: V: V earth = 1:2 = 0.5, so the answer is: 0.5



If an asteroid circulates around the sun at a constant speed and its orbit radius is four times the radius of the earth's revolution, then the cycle of the asteroid is___ Year


According to the centripetal force of circular motion provided by universal gravitation, gmmr2 = MR4 π 2t2, the planetary motion period T = 4 π 2r3gm can be obtained, so the asteroid period T row = 4 π 2r3 row GM = 4 π 2 (4R earth) 3gm = 84 π 2r3 earth GM = 8t earth = 8 years, so the answer is: 8