A composition on mercury exposure

Crystal is one of the five planets visible to the naked eye. Ancient people in China thought it was "the essence of water", so it was called mercury. So is there really water on Mercury?

The crystal pen is much more unique, its volume is 5.6% of the earth's, and it is far away, nearly 654.38 billion kilometers, so it is not easy to see its whole picture. The bigger obstacle is that it is very close to the sun. From the earth, sometimes it is blocked by the sun, sometimes it is located in the sun, and only in front of it is the bright background of the sun. Mercury is just a small black dot the size of sesame. Even so, the observation opportunity is only 13 times every 100 years. For hundreds of years, astronomers have been puzzled by the face of Mercury.

The question of whether there is water on Mercury was not solved until 1973. The spacecraft launched by the United States took more than 5,000 photos at a close distance from Mercury and sent them back to Earth. At this point, human beings saw the true face of Shui Xin for the first time. There is no atmosphere in the sky, and there are craters and basins everywhere. On the side facing away from the sun, the temperature is only 427 degrees Celsius; on the side facing away from the sun, the temperature drops to minus 17 1 degrees Celsius. Under such conditions, even if there is water and steam, it has already dispersed into the universe.

Now what we humans see is only a desolate and dry planet, but the unrealistic name Mercury will continue to be used.