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, the soil is actually 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:
When Apollo explores the moon, the lunar lander and the rocket will both hit the surface of the moon 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 shaded area:
When you look at the moon on the earth, you will see some black shadows. When astronauts landed in the dark 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 fairly high heat-above 6000 degrees Celsius-and mixed with some surrounding rocks.
Pure iron particles will not rust;
The rock samples brought back by astronauts from the moon all 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.
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.
Being magnetic is shocking:
In the early research on the moon, 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 on the bottom of the shell:
The data brought back by space exploration shows that there is a large piece of concentrate under the moon's shell, which has gravity and the spacecraft can't help tilting when it flies over. Scientists only know that these concentrates are a heavy and dense substance, and the rest know nothing.
In the vast starry sky, the most striking celestial body will light up in a few months. Its ever-changing appearance and the beautiful myths and legends it carries from ancient times to the present have added a lot of poetry and painting to this world! In Guanghan Palace, there is a jade building in Qionglou, where Chang 'e dances. Not only that, the periodic ups and downs of the moon are also one of the bases for people to make calendars since ancient times.
The moon revolves around the earth and rotates at the same time. The two periods are the same and the direction is the same, so the moon always faces the earth on the same side. In the long years before the satellite went into the sky, people never saw the back of the moon.
Why does the moon change? As we all know, the moon itself does not shine, but only reflects part of the sunlight that shines on it. In this way, for observers on the earth, with the change of the relative positions of the sun, the moon and the earth, the moon presents different shapes on different dates, which is the periodic change of the moon phase. Furthermore, although the moon is always illuminated by the sun, and the half sphere is bright, because the moon is constantly revolving around the earth and changing its position, the half sphere facing the earth and the half sphere illuminated by the sun sometimes completely overlap, sometimes completely do not overlap, sometimes a small part overlaps, and sometimes most of them overlap, so the moon presents a cloudy or sunny change.
When the moon is between the sun and the earth, its dark hemisphere is facing us, and we can't see any images of the moon at all. This is the "new moon". In astronomy, the new moon refers to the moment when the yellow meridian of the moon is the same as the yellow meridian of the sun. On the first day of the new moon, the moon and the sun rise from the east at the same time. Even if the earth reflects sunlight to the moon, the part of the light reflected by the moon will be completely submerged in the strong sunlight.
When the earth is between the moon and the sun, although the three planets are also on the same line, at this time, the moon hemisphere illuminated by the sun is facing the earth, and the soft moonlight shines on the earth all night. This is the full moon, which is "looking". At this time, the difference between the lunar longitude and the solar longitude is 180 degrees.
Because the distance between the moon and the earth is too short compared with the distance between the sun and the earth, the speed of the moon moving eastward on the celestial sphere is much faster than that of the sun. The moon advances from west to east every day 13 degrees or more, while the sun only advances 1 degree. Therefore, after the new moon, the moon quickly ran to the east of the sun. A day or two later, as soon as the sun goes down, a crescent moon can be seen in the western sky, with two sharp corners pointing to the east. From then on, the moon rose later and later, and it gradually became round. About seven days after the new moon, the yellow meridian of the moon just exceeds the sun by 90 degrees. The moon we see is a semicircle, and the arc faces west. This is the first quarter moon. After that, the moon continued to the east, more round, and then rose until it looked out. From the new moon to the moon, the distance between the moon and the sun is getting bigger and bigger.
Looking at the past, the moon gradually moved closer to the sun, and the surface of the moon gradually became thinner. When the yellow meridian of the moon exceeds the yellow meridian of the sun by 270 degrees, it becomes a semicircle again, but the arc faces east, which is the last quarter moon. At this time, the sun rises in the east and the moon is high in the southern sky. Naturally, the moon is invisible to our naked eyes. After the first quarter moon, the moon will not come out from the east until after midnight. Its semicircle is gradually eroded and becomes a narrow sickle with a sharp angle to the west. Looking at the new moon, the moon and the sun are getting closer and closer, and even disappear into the morning light like the ecliptic of the sun.
The cycle of the moon phase change, that is, the time from the new moon to the new moon or from the new moon to the new moon, is called the first month. The observation results show that the length of Wang Shuo's moon is not fixed, sometimes as long as 29 days 19 hours, sometimes only 29 days and 6 hours, and its average length is 29 days 12 hours, 44 minutes and 3 seconds.
The time interval between the moon and a star at the same time is called "sidereal moon", which is the real cycle of the moon's orbit around the earth. Wang Shuo's moon is longer than the star moon, just as the sun is longer than sidereal day. The moon and the stars have little to do with daily life, but it is the ebb and flow cycle of the moon, which is related to the ebb and flow of the earth, navigation and fishing, and has a great influence on people's activities at night. At the same time, it also occupies an important position in the last month of religion, so people naturally regard it as a longer time unit than a day.
The moon is rich in mineral deposits. It is reported that there are more rare metals on the moon than on the earth. There are three main kinds of rocks on the moon. The first is the Moon Sea Basalt rich in iron and titanium. The second is plagioclase, which is rich in potassium, rare earth and phosphorus, mainly distributed in the lunar highlands; The third type is mainly composed of 0. 1 ~ 1 mm debris particles. Moon rocks contain all the elements and about 60 minerals on the earth, 6 of which are not found on the earth. 3. What about the artificial moon?
In the future, maybe not too distant future, when you look up at the clear night sky, you will find two "moons": one is white and clear, and the other is a "balloon satellite" launched by the United States. The latter was conducted by American researchers at 1980 at 1! It was put forward at the annual meeting of scientific development held in Rijinshan. This is a special satellite, which will orbit the earth in the stratosphere of the earth's atmosphere, only about 30 kilometers from the ground. Seen from the ground, it is as bright as the moon, and the most imaginative scientist has given it a name: artificial "moon", which means "star".
This "star" around the stratosphere is different. Its ball wall is double-layered and made of extremely light materials, and the air between the ball walls is filled with 26℃. This artificial "moon" has a diameter of 1800 meters, an empty weight of 6,000 tons and a payload of 6,000 tons, which is about 200 times that of the spacecraft. Cost 1500 million dollars, only15 of the spacecraft. Astronauts don't have to wear complicated spacesuits to work in the sphere, but they can equip the pilots of the U-2 high-altitude reconnaissance plane with a set of equipment.
However, the purpose of launching this balloon satellite is not for illumination. This is a multipurpose "universal" satellite.
First, it can be used as a communication satellite. In contrast, although its coverage is not as large as that of communication satellites in synchronous orbit, it needs much less power than other satellites.
Can it be used as a military listening station? Absolutely. Like the moon, it can illuminate blurred targets and guide laser beams or particle beams to attack them. If a stabilizer is installed on a satellite, it can also be used to launch rockets.
In fact, it is also the most ideal space observation station, meteorological observation station and scientific experiment station. Taking meteorological observation as an example, it can send meteorological parameters to the ground and provide relevant information such as seawater temperature, sea surface wind speed, wave height and wave length. Do you want to carry out various experiments to improve the climate? I can help you, too For example, satellites can disperse clouds by irradiating them with microwaves of 22-60 chz, and even change the climate by ionizing and conducting the stratosphere.
The artificial moon can also be used as a power station. This is a power plant that works all day. Part of the electricity generated by the power plant can be used to heat the air on the balloon, and the rest will be transmitted to the ground in the form of 2.5CHz microwave.
Finally, balloon satellites can also be used to detect stratospheric pollution, and even help us get information about microorganisms, bacteria and viruses floating on the ground.
One-week multi-purpose artificial moon is promising.
Perhaps people will worry, will the balloon satellite secluded in the stratosphere be seriously disturbed by the wind and sway like a drunk? This kind of worry is unnecessary. Because the altitude is 20 kilometers in summer and 25 kilometers in winter, the wind speed is almost zero.
So is the balloon satellite round or square? At present, most people want to build a hexagonal artificial "moon". Although its shape has not been formally decided, it is generally believed that this satellite can only be brought into the stratosphere for inflation, otherwise it will be difficult to send such a thick and large balloon directly from the ground to the stratosphere!
4. What are the phenomena of "new moon" and "hope"?
In the vast starry sky, the most striking celestial body will light up in a few months. Its ever-changing appearance and the beautiful myths and legends it carries from ancient times to the present have added a lot of poetry and painting to this world! In Guanghan Palace, there is a jade building in Qionglou, where Chang 'e dances. Not only that, the periodic ups and downs of the moon are also one of the bases for people to make calendars since ancient times.
The moon revolves around the earth and rotates at the same time. The two periods are the same and the direction is the same, so the moon always faces the earth on the same side. In the long years before the satellite went into the sky, people never saw the back of the moon.
Why does the moon change? As we all know, the moon itself does not shine, but only reflects part of the sunlight that shines on it. In this way, for observers on the earth, with the change of the relative positions of the sun, the moon and the earth, the moon presents different shapes on different dates, which is the periodic change of the moon phase. Furthermore, although the moon is always illuminated by the sun, and the half sphere is bright, because the moon is constantly revolving around the earth and changing its position, the half sphere facing the earth and the half sphere illuminated by the sun sometimes completely overlap, sometimes completely do not overlap, sometimes a small part overlaps, and sometimes most of them overlap, so the moon presents a cloudy or sunny change.
When the moon is between the sun and the earth, its dark hemisphere is facing us, and we can't see any images of the moon at all. This is the "new moon". In astronomy, the new moon refers to the moment when the yellow meridian of the moon is the same as the yellow meridian of the sun. On the first day of the new moon, the moon and the sun rise from the east at the same time. Even if the earth reflects sunlight to the moon, the part of the light reflected by the moon will be completely submerged in the strong sunlight.
When the earth is between the moon and the sun, although the three planets are also on the same line, at this time, the moon hemisphere illuminated by the sun is facing the earth, and the soft moonlight shines on the earth all night. This is the full moon, which is "looking". At this time, the difference between the lunar longitude and the solar longitude is 180 degrees.
Because the distance between the moon and the earth is too short compared with the distance between the sun and the earth, the speed of the moon moving eastward on the celestial sphere is much faster than that of the sun. The moon advances from west to east every day 13 degrees or more, while the sun only advances 1 degree. Therefore, after the new moon, the moon quickly ran to the east of the sun. A day or two later, as soon as the sun goes down, a crescent moon can be seen in the western sky, with two sharp corners pointing to the east. From then on, the moon rose later and later, and it gradually became round. About seven days after the new moon, the yellow meridian of the moon just exceeds the sun by 90 degrees. The moon we see is a semicircle, and the arc faces west. This is the first quarter moon. After that, the moon continued to the east, more round, and then rose until it looked out. From the new moon to the moon, the distance between the moon and the sun is getting bigger and bigger.
Looking at the past, the moon gradually moved closer to the sun, and the surface of the moon gradually became thinner. When the yellow meridian of the moon exceeds the yellow meridian of the sun by 270 degrees, it becomes a semicircle again, but the arc faces east, which is the last quarter moon. At this time, the sun rises in the east and the moon is high in the southern sky. Naturally, the moon is invisible to our naked eyes. After the first quarter moon, the moon will not come out from the east until after midnight. Its semicircle is gradually eroded and becomes a narrow sickle with a sharp angle to the west. Looking at the new moon, the moon and the sun are getting closer and closer, and even disappear into the morning light like the ecliptic of the sun.
The cycle of the moon phase change, that is, the time from the new moon to the new moon or from the new moon to the new moon, is called the first month. The observation results show that the length of Wang Shuo's moon is not fixed, sometimes as long as 29 days 19 hours, sometimes only 29 days and 6 hours, and its average length is 29 days 12 hours, 44 minutes and 3 seconds.
The time interval between the moon and a star at the same time is called "sidereal moon", which is the real cycle of the moon's orbit around the earth. Wang Shuo's moon is longer than the star moon, just as the sun is longer than sidereal day. The moon and the stars have little to do with daily life, but it is the ebb and flow cycle of the moon, which is related to the ebb and flow of the earth, navigation and fishing, and has a great influence on people's activities at night. At the same time, it also occupies an important position in the last month of religion, so people naturally regard it as a longer time unit than a day.
Is the Moon Sea the Sea on the Moon? What is the biggest moon sea?
The dark part of the moon's surface seen by naked eyes is actually a vast plain on the moon's surface. Due to historical reasons, this misnamed name has been preserved to this day. 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. There are three on the back and four on the edge. The frontal moon sea area is slightly more than 50%. Among them, the largest "storm ocean" covers an area of 5 million square kilometers, almost the sum of nine French areas. Most of the Moon Sea is roughly round and oval, and most of it is surrounded by some mountains, but some of them are connected. Besides the sea, there are five lakes with similar topography: Hu Meng, Dead Lake, Fox Xia, Qiuhu and Chun Hu, but some lakes are smaller than the sea. There are three kinds of swamps: rotten swamps, popular swamps and dreamy swamps. 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 horizon of the moon, and the southeast of some of the lowest seas, such as Yuhai, 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 seems to be there now.
Which is older, the moon or the earth?
almost
7. Why did the eclipse happen?
Line up at three o'clock.
⒏: What pits are there on the moon?
The meteorite hit it.
Why does the moon have a full moon?
shadow
5. Why is the observatory round?
Broader vision
Since ancient times, the moon has had many other aliases. Do you think it's weird?
Luminous, Yuchan, Yulun, Guipo, Chanjuan, Guizai, Ice Wheel, Toad, Su E, Yutu.
5] What was the process of Beethoven's creation of Moonlight?
⒔ Who is the famous astronomer in the history of China? What are their outstanding contributions?
Who made the first scientific expedition to the moon in the history of China?
Why can people on earth only see the same side of the moon?