Why can't you see the moon during the day?

Because the sky you usually see is not space, but the earth's atmosphere, and the sun's light is scattered to make the atmosphere very bright, far exceeding the brightness of the moon's reflected light, so the moon can't see the bright side of the sun.

The moon, with its back to the sun, looks black on the earth, but because the atmosphere is too bright, it cannot be seen behind it. Even if the eyes can penetrate the atmosphere, only the bright side of the moon facing away from the sun can be seen because of the darkness in space.

So in any case, it is difficult to see the moon during the day, but it is easier to see the moon in the morning or at dusk, because the brightness of the atmosphere is reduced.

Extended data:

The moon revolves around the earth and rotates at the same time, with a period of 27.438+066 days, which happens to be a sidereal moon, so we can't see the back of the moon. This phenomenon, which we call "synchronous rotation" or "tidal locking", is almost a universal law in the satellite world of the solar system.

It is generally believed that it is the result of long-term tidal action of satellites on the planet. The libration is a wonderful phenomenon, which enables us to see 59% of the moon.

The appearance of the moon moves half a degree per hour for the background starry sky, which is similar to the apparent diameter of the moon. Unlike other satellites, the orbital plane of the moon is closer to the ecliptic plane than the equatorial plane of the earth.