Where does the moon live in the universe?

Moon

There is no consensus on the origin of the moon:

There are roughly three major schools of thought regarding the origin of the moon, but they are still not conclusive. Some scientists believe that the moon was formed 4.6 billion years ago from the gas and dust of the universe like the earth; others believe that the moon is the child of the earth and split away from the earth. However, the data brought back several times by Helios showed that the compositions of the moon and the earth are very different. Many scientists believe that the moon was accidentally sucked into the gravitational field many years ago, and thus was accidentally included in the earth's orbit. But some people cite celestial mechanics to object to this statement.

The moon is older than the earth:

What surprised scientists was that 99% of the rocks brought back from the moon were older than 90% of the ancient rocks on the earth. The moon rocks brought back by astronauts have been determined to be 4.3 billion to 4.6 billion years old, which is equivalent to the history of the solar system.

Soil is older than rocks:

The soil of the "Sea of ??Tranquility" where American astronauts first landed is actually older than the rocks. According to analysis, the difference between the two is 1 billion years. Chemical analysis shows that the soil on the moon did not evolve from rocks and may have come from elsewhere.

It will make a loud noise when it hits:

When the Helios is exploring the moon, the lunar landing craft and the rocket will hit the lunar surface when they return. But every time it makes the moon ring like a big gong or a big bell. During the Apollo 12 lunar exploration, the moon's echo lasted for 4 hours. No scientist can explain this phenomenon at present.

There are rare metals in the dark shadow area:

When you look at the moon from the earth, you will see some dark shadows. When the astronauts landed in this plain black shadow area, they found that there were many It is difficult to drill holes on its surface. According to research, soil samples here contain metallic elements such as titanium, berkelium, yttrium, etc. Scientists are very surprised by this because these metallic elements need to be heated at a very high temperature---6000 degrees Celsius. It can melt and mix with the surrounding rocks.

Pure iron particles will not rust:

The rock samples brought back by astronauts from the moon all contain pure iron particles. Scientists believe that these pure iron particles are not From meteorites. Some experts reported that these pure iron particles have not rusted for many years after being brought back to the earth. This is the first time in the scientific community that pure iron has not rusted.

The surface is as smooth as a mirror:

Many places on the moon's surface are as smooth as a mirror. It seemed as if it had been "scalded" by some intense heat from an unknown source. Experts have analyzed that this was not caused by the impact of a huge meteorite. Some scientists believe that the high heat from the sun is the main factor.

The magnetism is shocking:

Early lunar research said that there is no magnetic field on the moon. In recent years, after analyzing the lunar rocks, we learned that it has strong magnetism. However, if the moon's rocks really have a magnetic field, they should have an iron core. However, current data tells us that such a huge hot core cannot exist inside the moon, nor can it obtain magnetism from the earth's magnetic field. , because if the moon wants to obtain magnetism from the earth, it must be very close to the earth. If so, it may be destroyed by the force of the earth.

Condensate at the bottom of the shell:

The information brought back by space exploration shows that there is a large amount of concentrate under the moon's shell and it also has an attraction. The spacecraft cannot help but feel attracted when it passes by. To tilt. Scientists only know that these concentrates are a heavy and dense substance, and the rest is unknown.

The orbital radius is 384,400 kilometers from the earth

The satellite diameter is 3476 kilometers

The satellite mass is 7.35e22 kilograms

The moon, a satellite Our nearest star is not a star or a planet, but the only natural satellite orbiting the Earth. Of course, the moon has been known since prehistory. It is second in the sky only to the sun.

As the moon orbits the Earth once a month, the angles between the Earth, the Moon, and the Sun are constantly changing; we call this a synodic month. The appearance of one consecutive new moon takes 29.5 days (709 hours), which varies with the Moon's orbital period (measured by the stars) as the Earth simultaneously orbits the Sun.

The moon has no atmosphere. But evidence from the Clementine spacecraft suggests there may be solid water-ice at the moon's south pole, in the large craters on the permanently dark side. This has now been confirmed by the Lunar Prospector spacecraft. Apparently there is ice at the lunar north pole too. There are two main terrains on its surface: huge craters and ancient plateaus, and relatively smooth and young maria. The maria terrain (covering 16% of the moon's surface) is carved out by hot lava from volcanoes. Much of the surface is covered by layers of dust and stone fragments from meteor impacts. For unknown reasons, the lunar maria topography is concentrated on the side closer to the Earth. Most of the craters and volcanoes close to the Earth are named after famous scientists in history, while those on the back are mostly named after modern times.

The Moon was visited by the Soviet spacecraft Luna 2 in 1959, representing the first time humans visited it. It was also the first time humans explored a non-terrestrial body. It is also the only planet whose surface samples have been recovered. In the summer of 1994, the Moon was extensively mapped by the Clementine spacecraft. The Lunar Prospector is now orbiting the moon.

The gravitational field between the Earth and the Moon creates interesting phenomena. The most obvious is the tidal phenomenon. The point of the Earth facing the Moon has the strongest gravitational pull, while the point opposite to it has a weaker gravitational pull. The Earth, and especially the oceans, are not completely stationary, but extend slightly toward the Moon. If you look at it from the perspective of the earth's surface, you will see two expansion points on the earth's surface, one facing the moon and the other facing away.

The Earth and the Moon View the huge craters on the Earth and Moon from the Moon

The two hemispheres of the Moon

The lunar rock samples brought back by Apollo

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Moon

Europe's first lunar probe "Smart 1" successfully hit the moon in a small flash of light on the 3rd, ending nearly three years with a "gentle blow" to the moon. The space journey is also the prelude to a new round of human lunar exploration climax.

The European Space Agency issued a press release on the 3rd saying: "Early this morning, a small flash of light illuminated the lunar surface, and 'Smart 1' hit the 'Lake of Excellence' area on the moon." According to calculations, The impact point is located at 34.4 degrees south latitude and 46.2 degrees west longitude of the moon.

TV footage received here showed that when the news of the successful impact was confirmed, enthusiastic applause broke out in the hall of the control center in Darmstadt, Germany. Camino, head of the European Space Agency's probe project, said that the impact went as planned and "we landed."

European Space Agency spokesman Wee said in an interview with the media that the "Smart 1" "bumped" a large amount of material after impacting the moon, which will help scientists conduct further research on the impact point.

"Smart 1" hit the moon at 5:42:22 GMT on the 3rd (13:42:22 on the 3rd Beijing time). At that moment, the angle between it and the moon's surface was only A tiny 1 degree. Therefore, some experts humorously described this "lunar collision" as a "failure" on the moon.

The European Space Agency said that the time and location of this "moon collision" were carefully selected, and astronomers and amateur astronomers from South Africa to the Canary Islands, South America, the continental United States, Hawaii and other places Enthusiasts will have the opportunity to observe this exciting impact process, but it will take some time to evaluate the data and images they observe.

"Intelligent 1" hit the moon at a speed of only 2 kilometers per second, while the normal impact speed of natural celestial bodies can reach 70 kilometers per second. In comparison, the impact of "Intelligent No. 1" was much smaller and more "gentle". Experts say the impact may only leave a crater on the lunar surface with a diameter of 5 to 10 meters and a depth of about 1 meter.

"Smart 1" was launched in September 2003, with a cost of about 110 million euros (about 140 million US dollars). In addition to "exploiting waste heat" by impacting the moon for scientific research, it also tested a new solar ion engine and collected a large amount of data on the lunar morphology and mineral composition of the lunar surface.

Bernard Fuwan, scientist of the European Space Agency's "Smart 1" project, believes that the data obtained by the detector is a "huge wealth" that can be analyzed by scientists for months or even years. He said that at a time when lunar exploration has rekindled the interest of countries around the world, the detection results of "Intelligent 1" have "made valuable contributions" to lunar scientific research.

Following the completion of the mission of "Smart 1", Europe also plans to land astronauts on the moon and establish a lunar base in stages in the future. In addition, the United States, China, Russia, India and Japan have also proposed their own lunar exploration plans in recent years. Relevant experts believe that following the space race centered on lunar exploration between the United States and the Soviet Union in the late 1950s, mankind is embarking on a second wave of lunar exploration.

The moon is the closest planet to us and has a very close relationship with the earth. The origin of the moon has always been one of the topics that humans continue to discuss. Following the Apollo moon landing in 1969, mankind is embarking on the second wave of lunar exploration. According to the plan, our country will also send a spacecraft to explore the moon next year. The impact of the European probe on the moon can be said to be the prelude to this climax.

Wang Sichao said that the new round of lunar exploration craze will have three significances: First, the new round of exploration is expected to further confirm the origin of the moon. Through the first round of detection, humans have a new view on the formation of the moon. It is believed that the moon was formed by the collision of a Mars-sized object with the earth 4.6 billion years ago and the sputtering material that revolved around the earth. However, this is just a hypothesis and needs to be verified by further human exploration.

Secondly, the moon is rich in resources, such as helium mountains, which are urgently needed by mankind. A new round of lunar exploration will help mankind exploit and utilize these resources in the future.

Third, the moon will become a new scientific base for mankind, including the establishment of a lunar observatory. This is because the moon has observation conditions that are not available on the earth's surface. The new round of lunar exploration will help mankind achieve these wishes.

Wang Sichao said that with the advancement of science and technology, impacting celestial bodies and retrieving the materials inside the celestial bodies to study the causes and composition of the celestial bodies has become a better method for humans to explore the unknown world of the universe. choice. Compared with the feat of human beings "cannoning" a comet in July last year, the scale of the European probe's impact on the moon is much smaller, but this does not affect the significance of the impact

Whenever night falls, a round of The bright moon rises in the night sky, and its clear moonlight fills the earth, giving rise to countless emotions and reveries. Literati and poets are even more fond of the moon. The Tang Dynasty poet Zhang Ruoxu's "Who on the river first sees the moon, and when the river moon shines on people at the first time", and the Song Dynasty writer Su Shi's "When will the bright moon come, ask the blue sky for wine" can be praised. The above is a popular poem about chanting the moon.

The moon is commonly known as the moon, also known as the lunar moon. In ancient Chinese mythology, there are countless stories about the moon. In ancient Greek mythology, the moon goddess's name is Artemis, and she is also the goddess of hunting. The astronomical symbol of the moon is like a curved eyebrow, which also symbolizes the divine bow of Artemis.

The bright moon is in the sky, and we can clearly see the dark parts and bright areas on it. When early astronomers observed the moon, they thought that the dark areas were covered with sea water, so they called them "sea". The famous ones include the Sea of ??Clouds, the Sea of ??Shit, the Sea of ??Tranquility, etc. The bright part is the mountains, where there are many mountains, criss-crossing mountains, and dotted craters everywhere. Bailey Crater, located near the South Pole, has a diameter of 295 kilometers and can fit the entire Hainan Island into it. The deepest crater is Newton Crater, which is 8,788 kilometers deep. In addition to craters, there are also ordinary mountains on the moon. High mountains and deep valleys appear one after another, creating a unique scenery.

Can you find it elsewhere? It seems a bit long, no problem!!!