How long does it take to fly from the earth to the moon?

The moon is the closest celestial body to us. We will be full of illusions about the moon, hoping to go to the moon one day, and our aviation industry has been making progress. Chang 'e I is the best example. Then let's use constellation knowledge to reveal the distance from the earth to the moon. How long does it take to fly to the moon? Let's have a look!

Q: The distance from the earth to the moon A: The nearest distance is 380,000 kilometers, and the farthest distance is 400,000 kilometers.

How long does it take to fly from the earth to the moon? Answer: About 7-8 days.

In fact, the nearest distance from the earth to the moon is 380,000 kilometers, and the farthest distance is 400,000 kilometers. If the flight time is calculated according to the speed of light, it only takes about 1.2 seconds for light to travel from the earth to the moon, but human science and technology can't reach the speed of light, and human spacecraft don't go directly to the moon. Instead, it takes hundreds of hours to fly in the earth orbit first, and then accelerate to leave the earth orbit and enter the moon orbit. Take Chang 'e-1 as an example. After launch, Chang 'e-1 will orbit the earth for 16 hours, and then the ground will issue an acceleration command. Chang 'e-1 will fly to the lunar orbit for 24 hours, and then it will fly to the lunar orbit for 48 hours. Finally, the ground gives the command to fly to the moon, and Chang 'e-1 will accelerate to the lunar orbit. It takes five days in the middle, and about eight days in total, so it is not so simple for human spacecraft to fly to the end. To sum up, according to the current level of human science and technology and examples, it takes about one week for our aircraft to fly from the earth to the moon, about 7-8 days. Although it is not as fast as we thought, it is already a huge breakthrough for mankind.

How to Measure the Distance from the Earth to the Moon In the past, people tried to measure the distance from the Earth to the Moon. First, they get data from the most basic angle measuring tools, and use geometric equations to establish the "Aristakes" system. Through calculation, Aristakes thinks that the distance from the earth to the moon is 80 of radius of the earth's, that is, radius of the earth 637 1 km, multiplied by 80, you can get 509680km；; According to Archimedes, the distance from the earth to the moon is 62 times that of radius of the earth, that is, 637 1x 62 = 395002 kilometers.

In the second century BC, a mathematician and astronomer named Hipkus thought that the distance to the moon was 60 times larger than the radius of our earth. This conclusion is based on his observation of the movement of the moon and its periodic solar eclipse. Because the angle of the sun and the moon is the same during the eclipse, according to the similarity of the triangle, the ratio of the distance to the sun and the moon can be obtained. Applying these properties again, Hipax calculates that the diameter of the earth is 2.5 times that of the moon, that is, RL=R3/2.5.

From the angle of 1', people can observe an object whose size is 3483 times smaller than its distance, which has been known since the time of hipparchus. Therefore, the distance to the moon is 232xRz/2.5=60 radius of the earth, that is, 637 1x60=382260 kilometers. Most interestingly, the measurement with modern instruments confirmed the correctness of ancient scientists. Of course, now we can accurately measure the distance to the moon with the help of laser instruments. At the same time, the measurement time can be completed in a short time.

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