Identification of the moon, why is the moon called the moon?

On the 15th day of the lunar calendar, the first quarter is before the 15th month, and the second quarter is after the 15th.

Occasionally, I will go to school in the next class.

It's dangerous! ∧!

The moon phase upstairs is difficult, but it's no problem after a long time.

The moon is also known as the "moon". Its day is equivalent to 29 days on Earth. Before the invention of telescopes, people in ancient times could only look up at the bright moon with their eyes on a clear night.

Seeing that the surface of the moon is bright and dark, and the shape is peculiar, people make up such as Chang'e running to the moon.

The Moon is the only natural satellite of the Earth, probably formed about 4.5 billion years ago, and shortly after the formation of the Earth, there are several hypotheses about its origin, and the theory supported by more factual evidence is that it formed from the debris of a huge collision between the Earth and the Mars-sized celestial body "Theia", which gathered in the outer periphery of the Earth.

The front side of the moon is dotted with huge impact craters filled with basalt lava flows ejected from dark volcanoes, forming a vast plain called the "Moon Sea", in fact, there is not a drop of water in the "Moon Sea". Between the outer and lunar seas are bright, ancient plagioclase highlands and conspicuous impact craters.

It is the brightest object in the sky other than the Sun, and although it appears a very bright white, its surface is actually very dark and the reflectivity is only slightly higher than that of old asphalt. Because the moon is very conspicuous in the sky, coupled with the regular changes in the phases of the moon, it has had a significant impact on human culture such as myths and legends, religious beliefs, philosophical thoughts, calendar compilation, literature and art, and customs and traditions since ancient times.

The rotation of the Moon is equal to the period of revolution (known as tidal locking), so the Moon always faces the Earth on the same side. The Earth's ocean tides arise mainly due to the gravitational pull of the Moon. Since the tidal force of the earth's oceans is opposite to the direction of the earth's rotation, the earth's rotation is always subjected to an extremely weak force that "brakes" the earth's rotation and accumulates for a long time.

There is ample evidence that the Earth's rotation cycle is getting slower and slower, and the time of the day is increasing extremely slowly, about 1 second in a few years; Due to the Earth's reaction force, the Moon slowly moves farther and farther away from the Earth, moving about a centimeter away from the Earth every year. The ratio of the size of the Moon to the Sun is similar to the ratio of distance, making it almost the same apparent size as the Sun, and during a solar eclipse, the Moon can completely obscure the Sun and form a total solar eclipse.

(Pretty) moon.

(Beautiful) moon.

(Bright) moon.

(Lovely) moon.

(crooked) moon.

Usage of adjectives:Adjectives are generally used to modify nouns and are used as predicates or definites.

Generally, adjectives that denote nature can be modified with 'no' and 'very'.

Some adjectives can overlap, such as long, tall, and big; Adjectives should not have an object.

1. New moon: On the first day of each month, the moon rises and sets at the same time.

2. First quarter moon:

On the 7th and 8th of the first month of the month, I saw the moon in the western sky in the first half of the night, and the moon was bent to the west.

3. Full moon: On the fifteenth and sixteenth of each month, the sun and moon rise and fall, and the moon can be seen all night.

4. Second quarter moon:

On the 22nd and 23rd of each month, the moon is seen in the eastern sky in the second half of the night, and the moon is bent eastward.

The moon phase change chart is as follows:

From the figure, you can see the law of the moon's phase change and friendship: from the new moon to the full moon and then to the new moon, it is a cycle of moon phase change. This cycle averages days and is called a synodic month.

The first day of the lunar month is the fifteenth or sixteenth day of the lunar month. Towards the end of the month, the Moon will rotate again between the Earth and the Sun, and the waning Moon will rise again in the east shortly before sunrise. On the first day of the next month, it is Shuo again, and a new cycle begins.

New Moon (New Moon): The first day of the new month.

On the first day of the lunar month, when the moon moves between the sun and the earthly sphere, the moon blinds the earth with its dark side, and rises and falls with the sun, so that people cannot see it. The phase of the moon at this time is called the "new moon" or "new moon".

Embrow Moon (waning moon): around the second to seventh day of the first month.

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.

First quarter moon: around the eighth day of the first month.

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.

gibbous moon; Around the ninth to the fourteenth day of the first month.

After the winding, the moon becomes fuller and we can see most of the moon's bright hemisphere, and the phase of the moon is called "gibbous moon".

Full Moon (Mochizuki): Fifteen.

It's time for the lunar calendar. Ten.

At 5 and 16 o'clock, the moon runs on the celestial sphere to the opposite side of the sun, and the sun and 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.

The Moon is not very smooth and flat, as we see on Earth, but rather uneven.

The moon is also known as the sun yin, commonly known as the moon. It is the only natural satellite of the Earth, the closest celestial body to the Earth, and the most thoroughly studied celestial body. The only celestial body that humans have ever visited in person is the Moon.

The Moon is the most obvious example of a natural satellite. In the solar system, except for Mercury and Venus, all other planets have natural satellites. The age of the Moon is about 4.6 billion years.

The Moon has a layered structure such as a shell, mantle, and nucleus. The average thickness of the outermost lunar crust is about 60-65 km. Below the lunar crust to a depth of 1,000 km is the lunar mantle, which occupies most of the moon's volume.

Underneath the mantle is the lunar core, which is about 1000 degrees warm and most likely molten. The diameter of the Moon is about 3476 km, which is 3 11 of the Earth and 1 400 of the Sun. The volume of the Moon is only 1 49 of the Earth, and the mass is about 735 billion tons, which is equivalent to about 1 81 of the Earth's mass, and the gravity of the lunar surface is almost 1 6 of the Earth's gravity.

There are dark parts and bright areas on the surface of the Moon. When early astronomers looked at the moon, they thought that the dark areas were covered by seawater, so they called them "seas". The famous ones are the sea of clouds, the wet sea, the still sea, etc.

The bright part is the mountains, which are dotted with craters. Located near Antarctica, the Bailey crater is 295 kilometers in diameter and can fit the entire island of Hainan. The deepest mountain is Newton's crater, which is 8,788 meters deep.

In addition to craters, there are also ordinary mountains on the lunar surface. Mountains and deep valleys are stacked on top of each other, creating a unique scenery.

The far side of the moon map The front of the moon is always facing the Earth, and the reason for this is the result of the long-term action of the tides. On the other hand, the far side of the Moon is mostly invisible from the Earth, except in the area near the edge of the Moon's surface which is visible in the middle due to the movement of the scales. In the days when there were no probes, the far side of the moon was an unknown world.

One of the great features of the far side of the Moon is that there are almost no fainter lunar features like the Lunar Sea. And when an artificial probe runs to the far side of the moon, it will not be able to communicate directly with Earth.

The Moon is the only natural satellite of the Earth. The surface of the Moon is in the shape of a crater.