And the sun which shines by day from east to west shines upon the earth, and the night descends on the stars and the moon. The sun and the moon do not seem to meet, but sometimes the moon will also appear quietly during the day, forming a vision of the sun and the moon. Why is there such a wonderful sight
The size of the moon that can be seen on earth every day depends on the moon of the day, which changes every day. The moon rotates around the earth for less than 30 days, but it can take different shapes in the sky, usually broken down into eight months。
At some point in time, the moon is in full moon phase, and at a time when the moon and the sun are in relative position for the earth, we can observe from the earth that the moon rises on the other side of the horizon as it falls on one side of the horizon. The distance between the moon and the sun will then become closer and closer as the earth rotates, probably at the beginning of the new month, at a minimum. At this point, the moon can be seen on earth as almost synchronized with the rise and fall of the sun, and the moon will be above the horizon for 12 hours. Then, as time passes, the distance between the moon and the sun becomes ever more distant and goes back to the full moon, again and again。
In short, because the moon revolves around the earth, and the earth turns around the sun, the relative positions of the three are constantly changing and the moon appears during the day. At the same time, relative positions directly affect the extent of the sun's exposure to the surface of the moon, which determines the size of the moon that we can see on earth。
The atmosphere around the earth will disperse the light of the sun, thus making the day sky very bright, but if the distance between the moon and the earth is close enough and the moon is able to reflect enough light, its own brightness will be greater than the sky around it, and the moon will be clearly seen during the day。
The moon itself does not glow, but is brightened by reflecting the light of the sun. In fact, only 3 per cent of the sun's light irradiated on the surface of the moon was reflected on the moon, but those reflections were sufficient to make the moon clear in the night sky. Moreover, the moon, which reflects the sun, is much brighter than the sun, but much brighter than many stars on earth can see. This is one of the reasons why the moon sometimes appears during the day。
Unlike the earth, there is no atmosphere on the moon and no dispersing effect on solar light. As a result, stars cannot be observed by the naked eye during the day on earth, but on the moon, even if the sun shines again, the stars are clearly visible。
The present paper is prepared by the chinese people's university-affiliated secondary school at the second branch of the university of china。
