The difference between the mysterious moon and the first quarter moon.
1, different phases of the moon: from the phase of the moon, the complete edge arc of the moon can be regarded as a bow arm, and the two ends of the arc are connected by a dotted line, which is imagined as a bow string, and the strings are the upper first quarter moon and the lower second quarter moon of the moon.
2, the time of occurrence is different: the first half of the month is also called the first quarter moon, and the lunar calendar is about the second day to the eighth day. On the 22nd and 23rd of each month in the lunar calendar, only the semicircle on the east side of the moon can be seen, which is called the "lower quarter moon", and the moon at this time is called the lower quarter moon.
3. Different positions: the waning moon and the first quarter moon appear in the western sky in the evening and the first half of the night respectively, and their "faces" are all facing west, that is, the western half is bright; The waning moon and the last quarter moon appear in the eastern sky after dawn and midnight respectively, and their "faces" face the east, that is, the eastern half is bright.
About the string moon
The moon is divided into the first quarter and the second quarter. This is because the positions of the sun, the earth and the moon are constantly changing, and the moon phase profit and loss are also changing. In the first half of the month, the part of the moon illuminated by the sun gradually increased from the new moon to the full moon, and the moon phase changed from deficit to surplus. The replacement period of the moon phase is 29.53 days.
The so-called first quarter moon and the last quarter moon, from the phase of the moon, we can also see that the complete edge arc of the moon is the bow arm. When connecting the two ends of an arc with a dotted line, imagine it as a bowstring. Chords are the first quarter moon and the second quarter moon. For example, the moon in the overview is the first quarter moon, that is, the first half month, and the second quarter moon is the second half month.