The moon, the origin of the big collision, is said to be the only natural satellite of the earth, which may have formed about 4.5 billion years ago. There are several hypotheses about its origin. Among them, the "theory of the origin of the great collision" is supported by more factual evidence, that is, the debris generated by the huge collision between the earth and the Martian-sized celestial body "Teia" gathered around the earth and formed the moon with the passage of time.
Because the periods of the moon's rotation and revolution are equal (called tidal locking), the moon always faces the same side of the earth, which is called the front of the moon.
There are dark parts and bright parts on the surface of the moon, the bright part is highland, and the dark part is low-lying areas such as plains or basins, which are called the moon land and the moon sea respectively. In fact, there is not a drop of water in the Moon Sea.
There are a lot of moon seas on the front of the moon, and the structure on the back is very different from that on the front. The Moon Sea occupies a smaller area and has more impact craters.
The moon &; In order to realize the moon landing and field investigation, the United States organized and implemented a series of manned missions to the moon from 196 1 972, that is, the Apollo program? Apollo program. Apollo program is an epoch-making achievement in the world space history. It started in May of 196 1 year and ended in February of 1972. The sixth successful landing on the moon lasted about 1 1 year.
In 2004, China officially launched the lunar exploration project and named it "Chang 'e Project". The Chang 'e project is divided into three stages: unmanned lunar exploration, manned lunar landing and the establishment of a lunar base.
The secret on the back of the moon is actually the secret of mankind.
So, is there a secret on the back of the moon? So far, only a few big countries have been able to detect the moon, so for most countries, the moon is mysterious.
In addition, since Apollo landed on the moon in February 1972, the United States has not released photos of the back of the moon, which undoubtedly casts a mysterious veil on the theory of terror on the back of the moon.
On 2019131October 10: 26, the Chang' e-4 probe launched by China successfully landed near the back of the moon at 177.6 degrees east longitude and 45.5 degrees south latitude. The world's first close-up image of the back of the moon was sent back to the earth through the "Queqiao" relay star, which unveiled the mystery of the back of the ancient moon.
To sum up, the so-called secrets on the back of the moon, and even the theory of terror on the back of the moon, are all caused by ignorance, and it is we in China who uncover the mystery on the back of the moon. Proud of the motherland!