Know little about the moon.

1. The knowledge about the moon (about 50 words) is beautifully written.

The moon is very complicated, and it is not easy to explain it clearly. Just say some theories and research findings!

The moon is hollow, which was accidentally discovered by scientists during the human landing on the moon. If it is not completely hollow, at least there are many holes in it.

The relationship between the moon and the earth is not the traditional capture theory, sister theory and mother-child theory. The moon may have formed earlier than the earth, which denies the sister theory and mother-child theory. However, research shows that the moon may have suddenly appeared at a certain period in the history of the earth, and this appearance is more like consciously coming to earth orbit than being captured by the earth.

There is life on the moon, which needs to be treated with caution. Because so far, the real research on landing on the moon is very few, and this aspect has not been focused on several times. Life is different from advanced life, and bacteria and viruses are also life.

It is an indisputable fact that the moon is far away from the earth, but why it is far away needs to be understood, because the research on artificial satellites tells us that if there is no external force to force the satellite to leave, it can only move in its original orbit. So where does the force that forces the moon away come from?

These are all well-founded. As for those satellites, they are spaceships and bases for aliens to observe the earth, I won't list them because there is not much basis!

2. Little knowledge about the moon (20 words)

The moon rotates counterclockwise from west to east, and also rotates counterclockwise around the earth. Because of tidal locking, the moon's rotation period is equal to its period of revolution around the earth, which is about 28 Earth days. In the end, the moon always faces the earth "frontally" and its back always faces the earth.

There is no wind, no rain, no clouds in the sky and no weather change on the surface of the moon. No matter day or night, the sky on the moon is always dark Looking up at the stars on the moon will be brighter than on the earth; Looking at the stars on the back of the moon will be brighter than looking at the front of the moon.

Extended data:

The split theory of the birth of the moon;

As early as 1898, George Darwin, the son of the famous biologist Darwin, pointed out in the article Tides and Similar Effects in the Solar System that the moon was originally a part of the earth, but later, due to the rapid rotation of the earth, some substances on the earth were thrown out, which formed the appearance of the moon after it left the earth, and the pit left on the earth was the Pacific Ocean.

This view was quickly opposed by some people. They think that it is impossible to throw such a big thing at the speed of the earth's rotation. Besides, if the moon was thrown out by the earth, then the material composition of the two should be the same. However, through the analysis of the rock samples brought back from the moon by Apollo 12 spacecraft, it is found that there is a great difference between them.

The rocks on the surface of the moon are extremely old, ranging from 3 billion years to 4.2 billion years. The oldest rocks on the earth's surface are limited to metamorphic rocks exposed in some areas 3.8 billion years ago, while the rocks on the bottom of the Pacific Ocean are extremely young, which is completely contrary to the "split" theory.

People's Network-The Little-known "Other Side" of the Moon

The knowledge about the moon is short-lived.

1. The size of the moon is only 1/49 of the earth.

2. The gravity on the surface of the moon is about 1/6 of that of the earth.

The name crater was first named by Italian astronomer Galileo.

The deepest crater on the moon is Newton crater with a depth of 8788 meters.

The front of the moon always faces the earth.

6. There is a great temperature difference between day and night on the surface of the moon, with the highest temperature of+127℃ during the day and-183℃ at night.

7. The land on the moon is much older than the ocean on the moon, and it is the oldest topographical feature on the moon.

8. On the front of the moon, the area of the moon land is roughly equal to that of the moon sea, but on the back of the moon, the area of the moon land is much larger than that of the moon sea.

9. The moon sea is not a sea, but a dark part of the moon surface, which is actually a vast plain on the moon surface.

10. There are 22 confirmed moons, 3 in the back, 4 in the edge area and 15 in the front.

1 1. The largest moon sea is called "storm sea", which is 9 times as big as France.

4. Little information about the moon (short)

volcanic vent

The name crater was given by Galileo. It is a remarkable feature of the lunar surface, covering almost the whole lunar surface. The largest crater is Bailey crater near the South Pole, with a diameter of 295 kilometers, which is a little larger than Hainan Island. A small crater may even be a hole of dozens of centimeters. There are about 33,000 with a diameter of not less than 65,438+000m m. It accounts for 7- 10% of the lunar area.

female horse

The dark part of the moon seen by the naked eye on the earth is actually a vast plain on the moon. Due to historical reasons, this misnamed name has been preserved.

There are 22 identified moon seas, and some landforms are called "moon seas" or "moon-like seas". Most of the 22 recognized ones are distributed on the front of the moon. Three in the back and four on the side. On the front, the area of the Moon Sea is slightly over 50%, of which the largest "storm sea" covers an area of about 5 million square kilometers, almost the total area of nine French countries. Most of the moon seas are generally round and oval, and most of them are surrounded by some mountains, but some seas are connected together. Besides the sea, there are five lakes with similar topography-Hu Meng, Dead Lake, Fox Xia, Qiuhu and Chun Hu, but some lakes are bigger than the sea. For example, Hu Meng has an area of 70,000 square kilometers, which is much larger than Qihai. The parts of the moon and the ocean that extend to the land are called "bays" and "swamps", and they are both distributed on the front. There are five bays: Luwan, Xiawan, Central Bay, Hongwan and Yue Mei Bay. There are three kinds of marshes: humus, epidemic marshes and dream marshes. Actually, there is no difference between a swamp and a bay.

The topography of the Moon Sea is generally low, similar to the basins on the earth. The moon sea is1-2km lower than the average moon horizon, and the southeast of the lowest sea is even 6000m lower than its surroundings. The albedo of the moon (a physical quantity to measure the ability to reflect sunlight) is also relatively low, so it looks darker now.

Moon, land and mountains

The area above the Moon Sea on the surface of the Moon is called the Moon Land, which is generally 2-3 kilometers above the horizon of the Moon Sea. Because of the high albedo, it looks brighter. On the front of the moon, the area of the moon land is roughly equal to that of the moon sea, but on the back of the moon, the area of the moon land is much larger than that of the moon sea. Isotope determination shows that the moon and land are much older than the moon and ocean, and they are the oldest landforms on the moon.

Lunar radiation pattern

Another major feature of the moon's surface is that some younger craters often have beautiful "radiation patterns", which are bright belts extending in all directions with craters as radiation points, and they pass through mountains, the moon sea and craters almost in a straight line. The length and brightness of radiation patterns are different, and the most striking one is the radiation pattern of Tycho crater. The longest one is as long as 1800 km, especially at full moon. Secondly, Copernicus and Kepler craters also have quite beautiful radiation patterns. According to statistics, there are 50 craters with radiation patterns.

The reason for the formation of radiation pattern is still inconclusive. Essentially, it is closely related to the theory of crater formation. At present, many people tend to say that meteorite impact may make high-temperature debris fly far on the moon, with no atmosphere and little gravity. Other scientists believe that the function of volcano is not ruled out, and the eruption of volcano may also form a flying radiation shape.

Moon Valley (Moon Gorge)

There are many famous rift valleys on the earth, such as the Great Rift Valley in East Africa. There is also such a structure on the surface of the moon-those seemingly winding black cracks are the Moon Valley, and some extend for hundreds of meters to Qian Qian meters, with widths ranging from several kilometers to tens of kilometers. Most of those broad moon valleys appear on the flat land of the moon, while those narrow and narrow moon valleys (sometimes called moon streams) can be seen everywhere. The most famous Moon Valley is the alpine Moon Valley connecting Yuhai and Leng Hai, which is located in the southeast of Plato's crater. It cut off the Alps on the moon, which is very spectacular. The photos taken from space are estimated to be 130 km long and 10- 12 km wide.

5. Knowledge and problems about the moon. (Add 50 points to all answers)

1 July 20th, 2008. 1969, American astronauts neil armstrong and Edwin Aldrin successfully landed on the moon for the first time in the Apollo 1 1 spacecraft, realizing the dream of human beings landing on the moon.

2. Armstrong is in America. About the origin of the moon, there are roughly three schools of thought, but so far there is no conclusion. Some scientists believe that the moon, like the earth, was formed by the gas and dust of the universe 4.6 billion years ago; Some people think that the moon is a child of the earth, and it is split from the earth.

But the data brought back by Apollo several times show that the composition of the moon and the earth is very different. Many scientists believe that the moon was accidentally sucked into the gravity field many years ago, so it was accidentally brought into Earth orbit.

But some people cite celestial mechanics to oppose this statement. The moon is older than the earth: to scientists' surprise, 99% of the rocks brought back from the moon are older than 90% of the ancient rocks on the earth.

The moon rocks brought back by astronauts have been measured for 4.3 billion to 4.6 billion years, which is equivalent to the history of the solar system. Soil is older than rocks: in the "quiet sea" where American astronauts landed for the first time, soil is older than rocks.

According to analysis, the difference between them is 654.38+0 billion years. Chemical analysis shows that the soil on the moon did not evolve from rocks and may have come from other places.

The impact will make a loud noise: Apollo will hit the surface of the moon during the lunar exploration, and the spacecraft and rockets will also hit when they return. But every time, the moon will ring like a gong or a big clock. When Apollo 12 explored the moon, the echo of the moon lasted for four hours. At present, no scientist can explain this phenomenon.

There are rare metals in the shadow area: if you look at the moon on the earth, you will see some shadows. When astronauts landed in the shadow area of this plain, they found it difficult to drill holes in its surface. After research, the soil samples here contain metal elements such as titanium, thulium and yttrium. And scientists are very surprised, because these metal elements can only be melted at a very high temperature-above 6000 degrees Celsius and mixed with some surrounding rocks. Pure iron particles will not rust: all rock samples brought back by astronauts from the moon contain pure iron particles, which scientists believe are not from meteorites.

According to experts, these pure iron particles have not rusted for many years after being brought back to the earth. It is the first time that pure iron does not rust in the scientific community. The surface is as smooth as a mirror: the surface of the moon is as smooth as a mirror in many places.

It seems that I have been "burned" by some unknown heat. According to expert analysis, this is not caused by a huge meteorite impact, but some scientists believe that the high heat from the sun is the main factor.

Magnetism is shocking: in early lunar research, it was said that there was no magnetic field on the moon. In recent years, after analyzing the moon rock, people know that it has strong magnetism. But if the moon's rock really has a magnetic field, it should have an iron core, but the current data tell us that it is impossible for the moon to have such a huge hot core, and it is impossible to obtain magnetism from the magnetic field on the earth, because the moon must be very close to the earth if it wants to obtain magnetism from the earth. If so, it will be destroyed by gravity.

Concentrate at the bottom of the shell: the data brought back by space exploration show that there is a large piece of concentrate under the shell of the moon, and it has gravity, so the spacecraft can't help tilting when flying over. Scientists only know that these concentrates are a heavy and dense substance, and the rest know nothing.

4. Soil, rocks, hard metals, radioactive substances, magnetic fields, etc. Use a huge mirror to reflect the sunlight to the earth's backlight, with a distance of more than 63,800 kilometers. Since the moon itself does not shine, when the moon moves between the earth and the sun, we can see that the dark side of the moon is facing us from the earth, and at this time the moon is completely invisible, which is the so-called "new moon". When the earth is in the middle, that is, the bright side of the moon faces the earth as a whole, we will see the full moon. This time is called "look". The new moon occurs on the first day of the first lunar month, and the viewing takes place on the fifteenth and sixteenth.

No, the plain. 9. Storm Ocean10.1738km11. On 15 and 16 of the lunar calendar, the moon and the sun move in opposite directions. At this time, if the centers of the earth and the moon are roughly on the same straight line, the moon will enter the umbra of the earth and produce a total lunar eclipse.

If only a part of the moon enters the umbra of the earth, a partial lunar eclipse will occur. When the moon enters the penumbra of the earth, it should be a penumbral eclipse, but it is not called an eclipse because the brightness drops very little, so there are only two kinds of eclipses: total eclipse and partial eclipse.

Eclipses always occur in sight (full moon), but not every time, which is the same as not every new moon has an eclipse. Eclipse the phenomenon that the moon is completely or partially covered by the shadow of the earth.

A solar eclipse usually occurs on the 15th or 16th day of each month in the summer calendar, when the earth moves between the sun and the moon, but not every ecliptic can happen, because there is an intersection between the ecliptic and the ecliptic, so only on a moonlit night, when the moon continuously takes photos of the solar eclipse, the earth's shadow can be seen near the intersection of the ecliptic and the ecliptic, can observers on the earth observe the solar eclipse. Generally speaking, the number of eclipses occurs twice a year.

The diameter of the sun is much larger than that of the earth, and the shadow of the earth can be divided into umbra and penumbra. The diameter of the earth is about four times that of the moon. In lunar orbit, the umbra diameter of the earth is still 2.5 times that of the moon.

When a part of the moon is always covered by the umbra of the earth, a partial lunar eclipse will occur. When the moon completely enters the umbra of the earth, you can see the total lunar eclipse.

If the moon enters the penumbra, the sunlight will also be blocked. This phenomenon is called penumbral eclipse in astronomy. However, because the sunlight in the penumbra is still very strong, the penumbra eclipse is not easy to distinguish with the naked eye in most cases. However, penumbral eclipses often occur. According to the observation data, the percentage of penumbral eclipse, partial eclipse and total eclipse in each century is about 36.60% and 34.46%. 12. One autumn, Beethoven toured around and came to a small town on the Rhine.

One night, he was walking along a quiet path and heard the intermittent piano sound coming from a small room, playing his music. Beethoven approached the hut, the piano suddenly stopped and someone was talking in the room.

A girl said,' This.

6. Little is known about the moon

The moon is commonly known as the moon, also known as the Moon. The moon is the most obvious example of a natural satellite. In the solar system, except Mercury and Venus, all other planets are natural satellites. The moon is also about 4.6 billion years old and is closely related to the earth. The moon also has layered structures such as shell, mantle and core. The average thickness of the outermost lunar shell is about 60-65 kilometers. Below the lunar crust to the depth of 1000 km is the lunar mantle, which occupies most of the volume of the moon. Below the moon mantle is the moon nucleus, the temperature of which is about 1000 degrees, and it is likely to be in a molten state. The moon is about 3476 kilometers in diameter, which is 3/ 1 1 of the earth. Its volume is only 1/49 of the earth's, and its mass is about 735 billion tons, which is equivalent to 1/8 1 of the earth's mass. The gravity on the surface of the moon is almost equal to 1/6 of the gravity of the earth.

There are dark parts and bright areas on the moon. When early astronomers observed the moon, they thought that the dark area was covered by seawater, so they called it "sea". The more famous ones are the sea of clouds, the wet sea and the sea of tranquility. The bright part is the mountains, where mountains are stacked and criss-crossed, and craters are dotted. Bailey Crater is located near the South Pole, with a diameter of 295 kilometers, which can hold the whole Hainan Island. The deepest mountain is Newton crater, which is 8788 meters deep. Besides craters, there are ordinary mountains on the moon. Mountains and valleys overlap, giving you a unique perspective.

The front of the moon always faces the earth. On the other hand, except for the area near the edge of the moon, which is visible in the middle due to Libra movement, most areas on the back of the moon are invisible from the earth. In the era without detectors, the back of the moon has always been an unknown world.

A major feature of the back of the moon is that there are almost no dark moon features such as the moon and the sea. When the probe runs to the back of the moon, it will not be able to communicate directly with the earth.

The moon revolves around the earth for about one lunar month, and moves half a degree relative to the background starry sky every hour, which is similar to the apparent diameter of the moon. Unlike other satellites, the orbital plane of the moon is closer to the ecliptic plane than the equatorial plane of the earth.

Relative to the background starry sky, the time required for the moon to go around the earth (the moon makes one revolution) is called sidereal month; The time between the new moon and the next one (or the time between two identical moon phases) is called the new moon. The reason why Wang Shuo's moon is longer than that of the star moon is that during the earth's operation on the moon, it moved forward a certain distance in its orbit around the sun.

Because the rotation period of the moon is exactly the same as its period of revolution, we can only see that the moon always faces the earth with the same face. From the early days of the moon's formation, the moon was influenced by a certain moment, which led to the slow rotation speed. This process is called tidal locking. Therefore, part of the angular momentum of the earth's rotation is converted into the angular momentum of the moon's revolution around the earth. As a result, the moon is far away from the earth at a speed of about 38 mm per year. At the same time, the earth's rotation is getting slower and slower, and the length of a day is getting longer every year 15 microsecond.

The gravity exerted by the moon on the earth is one of the reasons for the tidal phenomenon. The orbit of the moon around the earth is synchronous, and the so-called synchronous rotation is not strict. Because the orbit of the moon is elliptical, when the moon is at perihelion, its rotation speed can't keep up with the revolution speed, so we can see that the eastern part of the moon reaches 98 degrees east longitude. On the contrary, when the moon is at apohelion, its rotation speed is faster than its revolution speed, so we can see that the western part of the moon passes through 98 degrees Darcy. This phenomenon is called Libra movement. Because the orbit of the moon is inclined to the equator of the earth, when the moon moves in the starry sky, the polar regions will shake about 7 degrees, which is called Libra movement. Furthermore, since the distance between the earth and the moon is only 60 times that of radius of the earth, if the observer observes the moon from sunrise to sunset, the observation point will have the displacement of the diameter of the earth, which can be seen in the area with the longitude of 1 degree. This phenomenon is called Libra movement.

Strictly speaking, the earth and the moon revolve around a concentric center, which is 4,700 kilometers away from the center of the earth (2/3 of radius of the earth's). Because the center of homogeneity is below the surface, the movement of the earth around the center of homogeneity seems to be "shaking". Seen from above the North Pole of the Earth, both the Earth and the Moon rotate clockwise. Moreover, the moon is also clockwise around the earth; Even the earth moves clockwise around the sun.

Many people don't understand why the inclination of the moon's orbit and the inclination of the moon from the axis change so much. In fact, the orbital inclination is relative to the central celestial body (the earth), while the axial inclination is relative to the orbital plane of the satellite (the moon) itself. In this definition, customization is very suitable for general situations (such as the orbit of a satellite) and the value is quite fixed, but the moon is not.

The orbit plane of the moon (ecliptic plane) keeps an included angle of 5. 145396 with the ecliptic plane (earth's orbit plane), while the rotation axis of the moon forms an included angle of 1.5424 with the normal of the ecliptic plane. Because the earth is not a perfect sphere, but bulges at the equator, the white road surface keeps precessing (that is, the intersection with the ecliptic rotates clockwise) and completes one week every 6793.5 days (18.5966). During this period, the angle between the white plane and the equatorial plane of the earth (the equatorial plane of the earth inclines to the ecliptic plane at 23.45) will change from 28.60 (i.e. 23.45+5. 15) to18.30 (i.e. 23.45-5. 15). Similarly, the angle between the rotation axis of the moon and the white plane will be between 6.69 (that is, 5. 15+ 1.54) and 3.60 (that is, 5. 15- 1.54). These changes in the lunar orbit will in turn affect the inclination of the earth's rotation axis, making it swing by 0.002 56, which is called nutation.

The two intersections between the ecliptic plane and the ecliptic plane are called the lunar intersection-the ascending intersection (north point) refers to the point where the moon passes to the north of the ecliptic plane; Descending node (South Point) refers to the point where the moon passes south of the ecliptic. When the new moon is just at the intersection of the moon, a solar eclipse will occur; An eclipse occurs when the full moon is just at the intersection of the moons.