The basic way to observe the phases of the moon, how the phases of the moon are formed

Moon phase observation for clear weather only:

1. At the beginning of the lunar calendar every month, the moon is basically invisible on the first and second days of the lunar month, which is the new moon.

This is the moon, the earth, and the sun are in a straight line, and the moon and sun rise in the east at the same time and set in the west at the same time.

2. On the third and fourth days of the first month, the moon rises a little later than the sun, and it cannot be seen during the day, only when the sun sets from the west, a linear crescent appears in the west of the sky, which is a crescent moon, and the crescent moon gap is to the east, and the arc is to the west.

3. In the future, the fifth and sixth days of the new year will also be fuller, and the position in the west will be higher than the previous few days, and the position is already half a day in the west. The crescent crescent is still notched to the east.

4. On the seventh and eighth days of the first month, the moon rises from the east at noon, of course it cannot be seen during the day, and when the sun sets, the moon has gone to the middle of the sky, which is half a moon and is the first quarter moon.

5. By analogy, on the fifteenth day of the lunar calendar, the moon "grows" into a perfect circle, which is the moon. The moon rises in the east when the sun sets and then sets in the west.

6. After entering the second half of the month, the moon will appear later every day, and it will be found that it is dark for a while before the moon rises from the east, and gradually there is a gap, the gap is to the west, and the sun rises from the east before the moon sets from the west.

7. And in the lunar calendar.

Two. Ten. After the 23rd and 23rd, the moon rises in the east in the second half of the night, and the time it can be seen is getting shorter and shorter.

8. During the first or second quarter of the moon, the moon is sometimes seen during the day. The Moon is seen to the east on the first quarter and to the west on the last quarter.

The law of the phases of the moon

1. On the first day of the lunar month, the moon.

Located between the Sun and the Earth. People on Earth happen to see the dark side of the Moon away from the Sun, so they can't see the Moon (equivalent to the "black moon") on Earth, which is called the New Moon or New Moon. This phase of the moon rises and sets almost at the same time as the sun, that is, the moon rises in the early morning and sets at dusk, only in the solar eclipse.

to be aware of its existence.

2. After the new moon, the moon revolves eastward around the earth.

As a result, the Moon moves away from the middle of the Earth and the Sun and deviates to the side, i.e., the Moon is located to the east of the Sun. The half moon of the moon illuminated by the sun faces west, and a part of it can be seen on the earth in the shape of a sickle, convex facing the sun to the west, which is called the moth crescent.

The moon rises after sunrise and sets after sunset, and it is in the sky with the sun, in a bright sky, so the moon phase cannot be seen. It is only some time after the sun sets that the crescent moon can be seen in the western sky.

Just looking at the phases of the moon is enough with the naked eye.

When looking, pay attention to record the time of observation, the location of observation, the altitude and azimuth of the moon seen, and the shape of the moon.

Another thing to note is that you can record what you see, and don't imagine it. For example, if you don't see the moon, it may be because of the weather, the observation time is wrong, even if you forget, you should write that you haven't seen the moon, and you must not be perfunctory. An observation record is a small matter, but academic integrity is the most important thing.

Moon phases. Reasons for its formation: due to the Moon.

It does not emit light, and when illuminated by sunlight, the half sphere facing the sun is a bright area, and the other half of the sphere is a dark area (blocked by itself).

As the position of the Moon changes relative to the Earth and the Sun, the side of the Moon illuminated by the Sun is sometimes facing the Earth, sometimes facing away from the Earth; Sometimes the part of the moon facing the Earth is larger, sometimes it is smaller, so that different phases of the moon appear.

It can be simply summarized into two things:

1. The moon does not glow, and trapped potatoes are opaque.

2. It is related to the relative position of the moon, earth and sun.

Causes of the moon phase: The moon shines by reflecting sunlight, which is not in the same position as the sun (ecliptic longitude).

poor), it will take on a variety of shapes.

The moon phase refers to the astronomical name for the sun-illuminated part of the moon as seen on Earth, also known as the moon's waxing and waning. The moon phase is formed by the relative position changes of the Sun, Earth, and Moon.

Judging the phases of the moon requires observing the shape and position of the moon. Here's how to judge the different phases of the moon:

1.Crescent Moon: The Moon and the Sun are on the same side of the Earth, so the Moon cannot be seen.

2.Crescent: The Moon is between the Sun and the Earth, and the west side of the Moon is illuminated by the Sun, but because the Moon is closer to the Earth, only a small part of the west side of the Moon can be seen.

3.First quarter moon: The moon reaches the opposite side of the sun, and the east side of the moon is illuminated by the sun, but because the moon is far away from the earth, only a small part of the east side of the moon can be seen.

4.Gibbous Moon: The Moon is between the Sun and the Earth, and the illuminated part of the Moon gradually increases.

5.Full Moon Chaos: The Moon and the Earth are on opposite sides of the Sun, and the illuminated part of the Moon is completely facing the Earth, taking on a circular shape.

6.Gibbous Moon: The Moon is between the Sun and the Earth, and the illuminated part of the Moon gradually decreases.

7.Last quarter moon: The Moon reaches the opposite side of the Sun, and the illuminated part of the Moon gradually decreases.

8.The Moon is between the Sun and the Earth, and there are very few illuminated parts of the Moon, showing an elongated shape.

It is important to note that the change of the moon phase is not done in a short period of time and usually takes days or even weeks. At the same time, the best time to observe the phases of the moon is in an environment free of clouds and light pollution.

While observing the moon, different shapes appear on different nights, and these different shapes are called moon phases. The phases of the moon are also known as the waxing and waning of the moon. The profit and loss phenomenon is caused by the following two reasons:

1. The moon itself does not emit light, but it can reflect sunlight. The moon's illuminated half of the moon is bright and the unilluminated half is dark.

2. The moon orbits the earth once a month, and then follows the earth to revolve around the sun every year, and the relative positions of the three celestial bodies of the sun, moon and earth are constantly changing, which leads to the phase of the moon.

When the moon is located between the earth and the sun, and the half of the sun is facing the earth, we see that the moon is dark, and it is called the moon.

After that, the moon gradually leaves the sun-earth line, and the moon phase takes on a sickle shape that protrudes westward and becomes larger and larger, until the moon, the earth, and the sun form a triangle, which is called the upper wind. After the winding, the part towards the limbs of the earth's half of the object grows larger and larger until the moon, the earth, and the sun form a line again, but this time the moon is illuminated towards the half of the earth, and the moon phase is full, which is called wang.

After looking, the moon phase becomes smaller, and the protrusion begins to move eastward, until the moon, the earth, and the sun form a triangle, and the moon phase is called the lower chord. After the second quarter, the moon gradually moves between the earth and the sun, and the new moon occurs again.

Types of Moon Phases The moon phases are calculated by the difference between the ecliptic longitude of the sun and the moon (the following degrees are the difference between the ecliptic longitude of the sun and the moon), and there are eight types in total:

New moon (the first day of the lunar calendar, i.e., the first day of the lunar calendar): 0 degrees;

Emei month (generally around the second night of the lunar calendar --- about the seventh day of the lunar calendar): 0 degrees--- 90 degrees;

First quarter moon (around the eighth day of the lunar calendar): 90 degrees;

Grabbous Moon (around the 9th lunar month --- 14th lunar month): 90 degrees --- 180 degrees;

Full moon (looking at the sun, around the night of the 15th or 16th day of the lunar calendar): 180 degrees;

Gradual waning gibbous moon (around the 16th lunar --- 23rd lunar calendar): 180 degrees --- 270 degrees;

Last quarter moon (around the 23rd lunar month): 270 degrees;

Waning Moon (around the 24th lunar month --- the end of the month): 270 degrees--- 360 degrees;

In addition, the last day of the lunar month is called the obscure day, that is, the moon is not visible;

There are four main phases of the moon: the new moon (the first day of the lunar calendar), the first quarter (around the eighth day of the lunar calendar), the full moon (around the 15th day of the lunar calendar), and the second quarter (around the 23rd day of the lunar calendar), all of which have a definite time of occurrence and are calculated by precise orbits. Moon phase change song.

The first new moon is not visible, only because of being trapped in the sun and the earth. Moon phase gif

On the seventh and eighth days of the first lunar month, the half full moon faces west.

The full moon rises on the fifteenth or sixteenth, and the earth picks the sun and the moon on one shoulder.

Twenty-two and three last quarters, the moon faces east in the second half of the night.

The crescent moon between the first quarter and the first quarter is called the crescent moon, and the crescent moon between the first quarter and the second quarter is called the waning moon.

A mantra (easy to remember): up up west west, down down down east east - meaning: the first quarter moon appears in the first half of the first half of the lunar month, the moon faces west, located in the western half of the sky; The last quarter moon occurs in the second half of the second half of the lunar month, with the moon facing east, in the eastern half of the sky.

Attached: Moon phase change chart.

All you have to remember about the phases of the moon is: "Up up West West, down down East East".

First Quarter Moon: The first quarter moon comes out in the first half of the night, and comes out in the west, with the moon facing west. Last Quarter Moon:

Contrary to the first quarter moon On the first day of the lunar month, when the moon moves between the sun and the earth, the moon faces the earth with its dark side, and rises and falls with the sun, so people cannot see it. The phase of the moon at this time is called the "new moon" or "new moon". After the new moon, the moon gradually moves out of the area between the earth and the sun, and then we begin to see a small part of the moon illuminated by the sun, like a curved eyebrow, so the moon phase at this time is called "the moon of the eyebrow".

This "crescent moon" can only be seen in the western sky in the evening. Around the eighth day of the lunar calendar, the moon has moved to a 90° angle east of the sun as seen from the earth. At this time, we can see the bright half of the moon to the west, and the moon phase at this time is called "winding".

The first quarter moon can only be seen in the first half of the night, and it submerges into the west in the middle of the night. After the winding, the moon becomes fuller day by day, and we can see most of the bright hemisphere of the moon, and the phase of the moon at this time is called "gibbous moon". It's the tenth day of the lunar calendar.

At 5 or 16 o'clock, the moon runs directly opposite the sun on the celestial sphere, and the sun and the moon are 180 degrees apart, that is, the earth is located between the sun and the moon. The full moon rises in the east at dusk and sinks west at dawn. After the full moon, the moon becomes "thin" as the sun and moon positions get closer.

It goes through the gibbous moon, the last quarter and the crescent moon in turn, and finally, returns to the position of the new moon. In China, it is customary to call the "Moon" in the second half of the month "the waning moon". The first and second quarters, the waxing crescent and waning moons are similar in appearance, but they appear at different times, in different positions, and in the direction of their bright surfaces.

The crescent 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 facing west, that is, the western half is bright; The waning moon and the waning moon appear in the eastern sky at dawn and the second half of the night, respectively, and their "faces" are facing east, i.e., the eastern half is bright. The average time it takes for the moon to move from the new moon position to the time it returns to the new moon position is days, that is, the average period of change in the phases of the moon is days, which is called a "synodic month".

Hope it helps!

Moon phase change song.

The first new moon is not visible, only because of being trapped in the sun and the earth.

On the seventh and eighth days of the first lunar month, the half full moon faces west.

The full moon rises on the fifteenth or sixteenth, and the earth picks the sun and the moon on one shoulder.

Twenty-two and three last quarters, the moon faces east in the second half of the night.

New Moon, First Quarter Moon, Gibbous Moon, Full Moon, Gibbous Moon, Last Quarter Moon, Waning Moon, New Moon.