What is a solar eclipse and when will it happen?

Solar eclipse is a very rare astronomical phenomenon, and its frequency is not high. We rarely see total solar eclipse, partial solar eclipse, annular solar eclipse and total solar eclipse, each of which is shocking enough. So what is the solar eclipse revealed by constellation knowledge? About when did it happen?

What is an eclipse? It is also called a solar eclipse. This means that the moon moves between the sun and the earth. If the three are in a straight line, the moon will block the sunlight, and the shadow behind the moon will just fall on the earth. At this time, the eclipse happened.

In folklore, the phenomenon of solar eclipse is called Tiangou Food Day. Eclipses only occur at the new moon, when the moon and the sun are in harmony. Eclipses are divided into partial solar eclipse, total solar eclipse, annular solar eclipse and total solar eclipse. When observing the solar eclipse, you can't look directly at the sun, otherwise it will cause temporary blindness and even permanent blindness in severe cases.

In recent years, Tianyu has two eclipses, 20 16. These two eclipses are the total solar eclipse on March 9 and the annular solar eclipse on September 1 day. On August 22nd, 20 17, Beijing time, a total solar eclipse swept across the United States. On the evening of August, 2065438 1 1, a partial solar eclipse was staged.

When will the solar eclipse occur? The moon runs between the sun and the earth on the first day of each month (that is, the first day of the lunar calendar), so the solar eclipse must happen on the first day of the lunar calendar, but it doesn't happen every day, because there is an angle of about 5 between the orbital plane of the moon and the orbital plane of the earth, so for most of the first day of the lunar calendar, although the moon is between the sun and the earth, these three celestial bodies are not in a straight line.

The reason why the data expansion of total solar eclipse is valued is mainly because of its great astronomical observation value, because the moon will darken the original dazzling sun and expose the corona layer that was not easy to observe. There are many important astronomical and physical discoveries in the history of science, all of which were made by taking advantage of the total solar eclipse.

The most famous example is a total solar eclipse in 19 19, which confirmed the correctness of Einstein's general theory of relativity. Einstein published his general theory of relativity in 19 15, which was extremely difficult and incredible at that time. This theory predicts that light will turn in a huge gravitational field.

The strongest gravitational field that humans can contact is the sun, but the sun itself emits strong light, so it is impossible to see whether the faint starlight in the distance turns when passing near the sun. However, if a total solar eclipse occurs and the sunlight is blocked, it can be measured whether the light has turned.

The opportunity appears in 19 19, but the total solar eclipse is in the South Atlantic, so it is difficult to observe it at a long distance. British astronomer Eddington set out with an enthusiastic and curious observation team. The observation results are very consistent with Einstein's pre-calculation results, which makes the theory of relativity recognized by the world.

The two total solar eclipses in China's history occurred twice in China and can only be seen in remote areas. Once in 1980, it can only be seen in Ruili, Yunnan, on the border between China and Myanmar. The other time is 1997 after the Spring Festival, which can be seen on the Sino-Russian border and the northernmost Mohe River in China. The latter's observation scale is beyond imagination. Astronomers and astronomy enthusiasts from all over the world have squeezed the small town in northern Xinjiang, which is usually inaccessible, into a more lively place than the Chinese New Year. Because the number of people greatly exceeds the reception capacity of the town, people can only camp on trains and cars.

It is said that it was still winter in Mohe at that time, and the temperature was around MINUS 25℃ during the day and reached MINUS 40℃ at night, dripping into ice, and people could not even find water to wash their faces and gargle. Nevertheless, no observer regrets seeing the total solar eclipse with his own eyes, and thinks it is a rare and precious memory in life.

Astronomical phenomena such as total solar eclipse have nothing to do with people's daily life. Eat and drink Lazar. But it represents an ultimate humanistic concern, an extreme love for nature, an eternal curiosity and awe of the iron law of nature that governs everything, and it inspires all mankind to continue to move forward in the exploration of the universe.

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