How humans have known about the Moon since ancient times

In ancient times, it was mainly by the eyes. Because there was no light pollution in ancient times. So you can see it very clearly.

Later, Galileo invented the telescope, and the observations could be made in more detail. So much so that later generations named the various regions of the moon. But in fact, telescopes at that time only saw the light and dark areas on the moon, so people put the dark places on the sea.

I can't remember what the name of the person is called. Later, telescopes became more and more advanced, and people began to launch satellites, so craters began to be named, and generally craters are named after some great scientists. For example, in China, there is Zu Chongzhi.

The detailed introduction was given to astronomy enthusiasts last year and the year before that, and a very detailed map of the moon was posted. If the landlord is interested, he can find it online.

In the process of exploring the moon, ancient people looked at the moon with their eyes, and there were many myths and legends about the moon. In the 17th century, the Italian scientist Galileo Galilei invented the telescope to observe the moon more clearly and painted.

The first topographic map of the lunar surface. Through the observation of celestial bodies through telescopes, Galileo denied the geocentric theory with facts and strongly supported the Copernican theory. In the last century, with the development of human spaceflight, human beings used too.

Empty telescopes to see the surface of the moon more clearly. The Americans landed on the moon in the 70s and brought back lunar soil. Japan also has a moon landing program, and we are very much looking forward to it.

The first thing to affirm is to observe with the eyes first, and then gradually invent various instruments for observing celestial phenomena for observation; The instrument must also be simple to ordinary, from imprecise to precise!

I saw it with my eyes, of course!

It's just that there are many ways to look at it.

Little by little, from shallow to deep, there is a feudal to scientific understanding.

The Moon is the most thoroughly studied celestial body. The second celestial body that humans have ever visited is the Moon. The age of the Moon is about 4.6 billion years.

The Moon, like the Earth, has a layered structure such as a shell, mantle, and core. 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 one kilometer, about 1 4 of the earth, 1 400 of the sun, and the distance from the moon to the earth is equivalent to 1 400 of the distance from the earth to the sun, so the moon is as big as the sun from the earth. The volume of the Moon is about 1 49 of the Earth, and the mass is about 735 billion tons, which is almost equivalent to about 1 81 of the mass of the Earth, and the gravity of the surface of the Moon is about 1 6 of the Earth's gravity.

That's what I know, thank you for your recognition. )

From Earth, the Moon sometimes obscures the Sun, planets, and stars (occultations), but it has never been seen obscured by other celestial bodies. The ancients were like this, and by looking at it, it was proved that the moon was the closest to the earth. Look at the written language called observation.

The observation time here is longer, and even has to be accumulated across generations, and it cannot be pulled down at a glance.

The Moon is the closest extraterrestrial object to the Earth, and it does not emit light by itself, but only emits light by reflecting sunlight, so it belongs to the planetary category in the classification of stars and planets.

But planets have several rules and regulations, which require planets to revolve around stars, and planets in the solar system must revolve around the sun, which the moon does not have at all, because the moon does not revolve around the sun, but around the earth, or around the center of mass formed by the earth and the moon.

Moon. Although the Moon is a terrestrial planet-like celestial body, it does not belong to a planet but to a satellite of the Earth. The Moon is on average only 10,000 kilometers away from Earth, which is just over 1 light second.

Although the moon is in the cold of space, it is not just cold, but hot and cold. Since the moon has no atmosphere, it cannot block or preserve solar radiation, so when the sun shines on the surface of the moon during the day, it is directly exposed, and the temperature can reach up to 160; At night or in the shade, without sunlight, the temperature will plummet to -180.

The reason why the ancients said that the moon was "very cold" or that it was a wide cold palace was mainly compared with the sun. When the sun comes out, the sun shines and feels warm or very sunny, and at night the moon comes out, like a round of ice and jade jade plate, the moonlight is sprinkled on the earth, a piece of brightness, it feels refreshing and cold, so it is imagined that the moon is "very cold".

I love astronomy, I support the moon, which is only 1 49 the size of the earth, and he flew around the earth 380,000 kilometers away from the earth's surface. On July 16, 1969, NASA used a Saturn rocket to send more than 100 tons of lunar exploration equipment to the moon for the first time, although many experts and scholars believe that the United States never landed on the moon, but I think that in 1969, that trip to the moon was actually real, and academicians of the Chinese Academy of Sciences once admitted that in 1969 Armstrong and Aldrin successfully landed on the surface of the moon After a pause of more than 6 hours, Xiao Ah was the first to walk out of the lunar landing chamber He spent 3 minutes walking down the 9th escalator and touched the surface of the moon with his feet This is the first time that human beings have been on a planet other than the earth It is a desolate and lonely world Hometown Earth Quietly leaning next to the two masters on the moon Wandering around for 2 hours Driving the eagle away from the moon The next morning broke through the atmosphere and landed in the waters of Honolulu in the Pacific Ocean The U.S. Navy sent *** to scoop up the two masters In fact, mankind has never given up on the exploration of the moon, and the United States has waited for the moon five times in succession, and collected a lot of valuable information on the moon, and when Nixon visited China, he once gave us 0 1 gram of moon rock, hehe, now, we will not lag behind, although we are only at the level of the United States in the 60s, but I believe that we in China will eventually go to the moon and dig up helium-3.