The Future of Earth's Moon

There are many strange things in the moon of the earth, and we can not explore infinite discoveries. One of the most interesting topics about the moon is whether we will live there in just tens or a century. For example, suppose the earth weighs 150 pounds. If you live in the moon, you will feel that you are weighing only 26 pounds. That is because the moon's gravity is only 17% of the earth's gravity. You will float in the dark sky If you are not yet attached to something, you will float in outer space and may never come back.

Indeed, from the Earth and Moon systems, the easiest way to describe the situation is to rotate the moon around the earth; but if you want to draw the earth and moon pictures about the sun's orbit, I will see the orbit of the moon. It is sinking towards the sun everywhere. It always "falls" towards the sun

Beginning in the Ptolemy era of ancient Rome, humans believed that the sun, the moon, the planet and the stars would orbit the earth. The concept of this Earth-centered theory is based on the observation that the sun and the moon seem to rotate once around the earth once a day, and the earth is stable and fixed. Then Nicolas Copernicus appeared, he did not think so. He observed that the planet sometimes crossed the sky behind the observation a few nights. He speculates that this is because the Earth and other planets are moving in the same direction, but at different speeds. This makes another slower planet appear to move backwards relative to the faster Earth.

The "Sun" of the moon is about 29 1/2 days of the earth. Since this rotation coincides with the orbit around the earth, only about 59% of the moon on the earth can be seen. When the moon was first formed its rotation speed and orbit was now very different. As time goes on, the earth 's gravitational field gradually slows the rotation of the moon until the orbital period and rotation speed are stabilized so that one side of the moon is always facing the earth. Therefore, if the mass of the moon tries to become unidirectional (straight), the Earth will draw it in another way (toward the Earth) at the same time. Furthermore, the impact of the Earth's gravitational field is stronger on the side closest to the earth than on the far side (the same effect as the moon's gravitational field on various parts of the Earth's surface).

Eclipse occurs only under the sun, the earth and the moon are on a straight line (called "syzygy"). When the moon is between the sun and the earth, a solar eclipse occurs in the new moon. By contrast, when the earth is between the sun and the moon, the moon occurs in the full moon. The size of the apparent moon is basically the same as the size of the sun, and both angle of view are close to half the width. The sun is much bigger than the moon, but that distance is much larger than that approximate and much smaller moon from the Earth perspective. Because of noncircular orbits, apparent size changes are almost the same, but they occur at different cycles. This enables a solar eclipse (the moon looks bigger than the sun) and a ring (the moon looks smaller than the sun). Among the whole food, the moon completely covers the sun disk, and the naked eye can see the sundial