History, Internal Structure and Important Information of Moon:
History of the Moon:
There are eight planets in our solar system. Some of them have satellites. The planets Mercury and Venus have no satellites. Mars has two satellites, Phobos and Deimos. Earth has only one satellite, the Moon. The Moon is the brightest object in the sky after the Sun. In size it is a quarter of the Earth. It orbits the Earth approximately every 27 days. Moon is an uninhabited body. There is neither air nor water. Air and water are the basic necessities of life to thrive. In the absence of atmosphere, the sun's heat falls directly on the surface of the moon, so there is a big difference between day and night temperature. Like our planet, the Earth of the Moon is also littered with diverse geographical compositions.
Among these rocks, mountains, plains, craters etc. are prominent. Most of the rocks on the Moon are between three and four and a half billion years old. The gravity on the Moon is only one-sixth that of Earth. That is, the weight of the object there is six times less. Soviet Russia first visited the Moon in the late sixties. 46 years ago i.e. on July 20, 1969, man stepped on the moon for the first time. American astronaut Neil Armstrong was the first person to step on the Moon. He was leading NASA's Apollo 11 mission. His spacecraft 'Luna 2' visited the Moon. The Moon is the only body on which humans have stepped. The last manned visit to the Moon took place in December 1972. In 1994, the Clementine spacecraft extensively mapped the surface of the Moon. It has also indicated the possibility of some water ice in the deep crater near the south pole of the Moon.
Moon's internal structure:
The Moon is a differentiated body geochemically composed of three parts: the crust, the mantle and the core. The Moon has a solid inner core containing a majority of iron with a radius of 240 km, and the outer part of this inner core is mainly composed of liquid iron with a radius of about 300 km. Surrounding the core is a partially molten boundary layer with a radius of 500 km. There are two primary types of terrain on the Moon: a large number of craters and very old highlands and relatively smooth and young lowlands. The largest black spot visible on the Moon is the lowlands.
Moon's magnetic field:
The Moon has an external magnetic field of about 1-100 nanotesla. It is less than a hundredth that of Earth.
Important facts about Moon:
- The Moon is the only satellite of the Earth.
- Scientists believe that about 450 million years ago, a meteorite named 'Thaiya' collided with the earth and it was so tremendous that some part of the earth fell apart, which led to the birth of the moon.
- It takes about 28 days for the moon to revolve around the earth and this is called synchronous motion.
- So far, only 12 people have gone to the moon.
- The Moon is only 27% the size of the Earth.
- The moon appears round from the earth, but it is not completely round, it is in the shape of an egg.
- For the last 41 years no human has been on the moon.
- If the moon disappears from the earth, then the day of the earth will be only 6 hours.
- Out of all the 63 satellites present in the universe, the moon comes at number 5 in size.
- The temperature of the moon goes up to 180 degrees Celsius during the day, but the night temperature comes down to -153 degrees Celsius.
- Only 59% of the Moon is visible from Earth.
- When there is a lunar eclipse on the earth, there is a solar eclipse on the moon.
- Your weight on the Moon is less than six times the weight of Earth. If your weight on earth is 60 kg, then your weight on the moon will be only 10 kg.
- The Moon weighs about 81 billion tons (8100, 00, 00,000 tons).
- Half moon shines 9 times less than full moon.
- The black spots on the moon are called frogs in China.
- The highest peak of the moon is Manas Huygonus, whose length is about 4700 meters.
- There have been claims of water on the moon by many scientists in the world, but the first water was discovered by India.
- The distance of the Moon from Earth is 3,84,315 km.
- The moon moves 3.4 cm away from the earth every year, thus after passing 50 billion years, the moon will orbit the earth in 47 days.
- The moon has no light of its own, but this light is the effect of the light coming from the sun.
- If you have ever seen the moon carefully at night, it does not look the same size every night because the part of the moon on which the sunlight falls, we see the same part of the moon from the earth. That is why we see the moon sometimes half and sometimes full circle.
- We can see only 59% of the moon from the earth because only in this part the sun's rays fall on the moon, due to which it is visible from the earth. The rest of the Moon is never visible from Earth.
- The moon has 14 days of day and 14 days of night. Because the moon revolves around the earth in 28 days.
- Rakesh Sharma is the first Indian to go into space.
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