What kinds of moon phases are there?

There are four phases of the moon, mainly the new moon, the first quarter, the full moon and the last quarter.

1, new moon: On the first day of the lunar calendar, the moon lies between the sun and the earth. People on earth only see the moon deviating from the dark side of the sun, so they can't see the moon on earth, which is called a new moon or a new moon.

2. Winding: About July and August of the lunar calendar, as the moon continues to move eastward around the earth, the relative positions of the sun, the earth and the moon become right angles, that is, the connection between the moon and the earth becomes 90 degrees. Observers on the earth just see that the moon is bright in the western half, and the bright side faces west. This is a semicircle called the first quarter moon.

3. Full Moon: On the 15th and 16th day of the lunar calendar, the moon moves to the outside of the earth, that is, the sun and the moon are located on both sides of the earth.

4. First quarter moon: On the 22nd and 23rd of the lunar calendar, the relative positions of the sun, the earth and the moon become right angles again. The moon faces east and is called the last quarter moon.

The significance of the moon phase

1, tide

The phase of the moon is related to the tide of the ocean, because the tide is directly related to the gravity of the moon, for example, a full moon will cause a spring tide.

The change of tides directly affects people's lives. Military affairs, tourism, ocean navigation, marine fisheries, mariculture, marine engineering, scientific experiments and various coastal production activities are all affected by tides.

2. Lighting equipment

Because the lighting in the sky at night mainly depends on the moon, people must also consider the moon phase when they are active at night, especially in remote and barren areas.

3. Religion

It is related to some religious activities, especially Islam, which is Ramadan.

4. Meaning

China has attached importance to the full moon since ancient times, and the full moon often represents perfection, smoothness and auspiciousness.