What is the moon phase and what is the moon phase?

The sun-illuminated parts of the moon are seen in different parts of the earth and at different times, but in fact, the moon is illuminated by hemispheres, but we can't see some parts. The first day of the new moon is the new moon (New Year's Moon), the moon is between the earth and the sun, cannot be seen, and rises and sets with the sun; Beginning.

The third and fourth are the Moth Eyebrow Moon, 9:00-21:00; Beginning.

Seven and eight are the first quarter moon, the moon rises at noon, and the moon does not have at midnight; Ten.

1st and 12th gibbous moon, 15:00-3:00; Ten.

The fifth and sixteenth are the full moon (look), the earth is between the moon and the sun, and the sun rises and sets; Ten.

8th and 19th is the gibbous moon, 21:00-9:00; Two.

Ten. 2. 23 is the second quarter moon, 24:00-12:00; Two.

Ten. Sixth, twenty-seventh is the moon of moth eyebrows, 3:00-15:00.

To put it simply. The phases of the moon are the various shapes of the moon.

Its variation is due to:

1。The moon itself does not emit light or is transparent, and only shines by reflecting the sun's rays.

2。The result of the changing positions of the Sun, Earth and Moon.

And then. You only have to remember six words: go to the western heavens.

Lower East Heaven. The first day of each month.

Crescent moon. The sun and moon rise and set at the same time.

The moon was not seen all night.

The seventh and eighth days of the first month. First quarter moon.

It was the moon that I saw in the western sky in the first half of the night.

At this time, the moon is bent to the west.

Fifteen, sixteen.

Full moon. The sun and moon rise and fall.

The moon is visible all night.

Two-two, two-three.

Last quarter moon. It is to see the moon in the eastern sky in the second half of the night.

The moon is bent to the east.

The moon itself does not emit light, it can only reflect the sun's brilliance. Thus, under the light of the sun, the Moon is forever divided into a light hemisphere and a dark hemisphere. But on Earth, the Moon sometimes has more light parts and sometimes more dark parts; Sometimes the light part is expanding, and sometimes the dark part is expanding.

The changing conditions of the light and dark parts of the moon are called the phases of the moon.

The different phases of the moon are related to the direction in which the moon is observed. If the moon is observed in the direction of the moon's back sun, the moon is almost all black, and the moon at this time is called a crescent; On the other hand, if the Moon is observed from the Sunward direction, the Moon is almost entirely bright, and the Moon is called a Full Moon. The change of the moon phase is the process of gradually changing from a new moon to a full moon, and from a full moon to a new moon.

When the crescent moon appears, the moon and the sun are on the same side of the earth, which is called the conjunction of the sun and the moon, also known as the "new moon". When the full moon appears, the moon and the sun are on opposite sides of the earth, which is called the sun-moon opposition, also known as "looking". Therefore, the change of the moon phase can also be called the synodic change.

The moon phases change periodically. On the first day of the lunar calendar, the moon cannot be seen on the earth, and this day is the new day. A day or two after the new twent, in the evening the western sky revealed a curved moth crescent, convex in the direction of the setting sun.

Later, the position of the Moon gradually shifted eastward relative to the Sun, and the bright part expanded day by day, and after five or six days, it became the "first quarter moon" with half light and half (the western half bright), and the sunset was due south of the observer. Seven days later (around the fifteenth day of the lunar calendar), the full moon arrives, and at sunset, the sun is in the west and the full moon is in the east, looking at each other from the earth. The full moon rises in the east in the evening and sets in the west in the morning the next day, shining all night long.

After the full moon, the western part of the moon becomes increasingly scarce, and after seven days, it becomes the "last quarter moon" with half light and half dark (the eastern half is bright). The last quarter moon rises in the middle of the night. After the last quarter of the moon, the moon continues to deficit and becomes the waning moon that hangs in the eastern sky before dawn.

The waning moon in the sky is getting closer and closer to the sun, and the bright parts are becoming less and less, until it finally turns in the same direction as the sun, and the moon turns all black, and the new moon comes again.

The new moon and the full moon, the first quarter and the second quarter moon all appear periodically, and the time from this new moon (or full moon) to the next new moon (or full moon) is the moon phase change cycle, which lasts about 29 and a half days. This cycle is called the synodic cycle, and the lunar calendar is set as one month according to the synodic cycle, which is also called the synodic month.

There are eight types of moon phases:

New Moon (New Moon, the first day of the lunar month): Almost invisible, or faintly visible, a thin line.

Moth eyebrows only clear moon (the first two days of the lunar calendar, the first six fingers): like eyebrows like a bow.

First quarter moon (beginning of the lunar calendar.

7. The eighth day of the first month): semicircle.

Grabbous Moon (94th day of the lunar calendar): Ellipse.

Full Moon (Mochizuki, lunar calendar.

Ten. v.xvi.): Disc.

Waxing gibbous moon (17th 23rd lunar month): Ellipse.

Last quarter moon (around the 23rd lunar month): semicircle.

Waning Moon (the end of the 24th month of the lunar calendar): like an eyebrow like a bow.

At the end of the lunar month, it turns into a new moon when it is like a sky: it is almost invisible, or a thin line is faintly visible.

The phases of the moon are the New Moon, the Upper Moth Mei Moon (Moth Mei Moon), the First Quarter Moon, the Grabbing Gibbous Moon, the Full Moon, the Fading Gibbous Moon, the Last Quarter Moon, the Lower Moth Mei Moon (waning moon), and the obscure moon.

1. New Moon.

The difference between the sun and the moon is 0°, at this time the moon is located between the earth and the sun, facing the earth with a dark side, and almost at the same time as the sun, so it cannot be seen on the ground, this is the new day, this day is the first day of the lunar calendar.

2. First quarter moon.

The moon continues to rotate forward until the beginning of the lunar calendar.

Seven, eight, the yellow longitude difference is 90 °, the sun sets, the moon is already overhead, in the middle of the night, the moon sets, at this time the moon illuminated by the sun, exactly half of it is for you to see, called the "first quarter moon".

3. Full moon. It's time for the lunar calendar.

Ten. 5. 16. The Moon turns to the other side of the Earth, and the ecliptic longitude difference is 180°. At this time, the earth is in the middle of the sun and the moon, and the half of the moon illuminated by the sun is exactly facing the earth, and what we see at this time is the full moon, or "hope". Because the moon is disturbed on the opposite side of the sun, the sun sets in the west, and the moon rises in the east, and when the moon sets, the sun rises again in the east, and a bright moon can be seen all night.

4. The last quarter moon.

After the full moon, the moon rises later and later, and the bright part of the moon is getting smaller and smaller day by day, and by the twenty-third day of the lunar calendar, the yellow longitude difference is 270 degrees. Half of the full moon is lost, and the half moon only appears in the eastern half of the sky in the second half of the night, which is the "last string".

5. Moth eyebrow moon.

The moon or moon phase at the end of the lunar month. Because of its shape like eyebrows, it gets its name. The waning moon is the dawn of the end of the month, appearing in the eastern sky, with the moon facing east, in a c-shape.

The waning moon and the moth eyebrow moon (full moon) are divided into the new moon and the remnant moon and the moth eyebrow moon. The crescent moon appears in the western sky in the evening of the first month of the month, with the moon facing west and in an inverted c-shape. The waning moon is at dawn at the end of the month and appears in the eastern sky, with the moon facing east, in a c-shape.

Emei Moon: The moon or moon phase at the end of the lunar month.

Full Moon: The moon on the fifteenth night of each month of the lunar calendar.

Gibbous Moon: Lunar monthly.

Ten. 2. 13th.

Quarter Moon: In the first half of the month, the moon's surface from the new moon to the full moon towards the earth is illuminated by the sun and gradually increases, and the moon phase turns from loss to profit.