Will the moon weaken? As we know, the moon satellites around the earth have neither heat nor light. In the dark space, the moon reflects sunlight, and we can see it. During the course of the moon's orbit around the earth, its relative position with the sun and the earth is constantly changing. When it is between the earth and the sun, opposite the moon of the earth, the sun can't shine, and then we can't see it. This is the new moon, called the new moon. Two or three days after the new moon, the moon slowly turned an angle along the orbit, facing the earth, and the side of the sun gradually lit up, so we hooked a new moon in the sky and looked up.
After that, the moon around the earth continued to rotate towards the earth. The sun is shining and there are many sounds every day, so the new moon is "fat" every day: it will wait until the seventh or eighth day at most, facing the earth, and half of it will be sunny, so we saw the night for a month and a half. After waxing, the moon and the sun gradually entered the opposite side, and then towards this side of the earth, they saw more and more brilliant sunshine. Until the moon and the sun are completely opposite, that is, the moon has been facing the sun here, we can see a full moon, that is, the full moon. After the full moon, it is called hope. On one side of the moon and the earth, the other part of the sun is not bright, but slowly shines, which shows us that the moon is gradually becoming thinner. The full moon can only see half of the moon in the sky, which is the waning moon. Later, in the first quarter, the moon continued to "slim down". It took four or five days to hook the hook. After that, the moon slowly became completely invisible and the new moon period began. The changing moon is the result of the moon revolving around the earth. The moon doesn't shine, but reflects sunlight.