How is a total solar eclipse formed, and how is a total solar eclipse formed?

A total solar eclipse is when the moon circles the earth and turns between the sun and the earth, if the sun, the moon, and the earth are exactly aligned or close to a straight line, the moon blocks the sunlight that shoots to the earth, and the black shadow behind the moon falls exactly on the earth, and the solar eclipse phenomenon occurs. People in the shadow of the moon on the earth began to see the sun gradually weakening, the sun surface was obscured by a round black shadow, when the sky turned dark, all the brightest stars and planets could be seen in the sky, and after a few minutes, the sun gradually appeared from the edge of the moon's black shadow, and began to produce light and recircle. Since the Moon is smaller than the Earth, only people in the shadow of the Moon can see the eclipse.

A total solar eclipse occurs when the Moon blocks the Sun completely, and the duration of the total solar eclipse is no more than 7 minutes and 31 seconds. When a total solar eclipse occurs, it can be divided into five types of eclipse signs according to the position relationship between the circular plane of the moon and the circular plane of the sun: 1. Initial eclipse.

The Moon moves faster than the apparent motion of the Sun. During a solar eclipse, the Moon catches up with the Sun. When the eastern edge of the Moon has just "touched" the western edge of the Sun, it is called the first "exodus", which is the beginning of a solar eclipse. 2 Food.

About an hour after the first eclipse, the moment when the eastern edge of the Moon and the eastern edge of the Sun are "intangible" is called an eclipse, which is the beginning of a total solar eclipse, when the Moon obscures the entire Sun; 3 Food. It is the time when the sun is eclipsed deepest, and the center of the moon moves to the closest to the center of the sun; 4 Shine. The moment when the western edge of the moon and the western edge of the sun are "intangible" is called shengguang, which is the end of the total solar eclipse; It generally takes only two or three minutes from food to light, and the longest is not more than seven and a half minutes; 5 Round.

About an hour after the light is born, the western edge of the Moon and the eastern edge of the Sun "touch" each other, which is called a recircle, and from this point the Moon is completely "detached" from the Sun, and the eclipse ends. Satisfied.

A solar eclipse, also known as an eclipse, is an astronomical phenomenon that occurs only when the Moon moves between the Sun and the Earth. At this time, for parts of the Earth, the Moon is in front of the Sun, so some or all of the light from the Sun is blocked, so it appears as if part or all of the Sun is gone. Solar eclipses only occur at the New Year, when the Moon and the Sun are conjunct.

Solar eclipses are quite rare phenomena, and the rarer of the four types of solar eclipses is a total solar eclipse, as the eclipse can only be observed in the region when the moon's umbra is projected on the Earth's surface. The total solar eclipse is a magnificent natural spectacle, so it often attracts many tourists to go overseas to see the total solar eclipse. For example, the total solar eclipse that occurred in Europe in 1999 attracted a lot of tourists, and some travel agencies launched itineraries designed specifically for these tourists.

In ancient times, humans lacked knowledge of astronomy, and thought that the eclipse was caused by the tengu eclipse, or symbolizing the coming of calamity, and the ritual was held during the eclipse. But in modern society, the meaning of solar eclipses has gradually been abandoned. The last total solar eclipse occurred on August 1, 2008, and the next total solar eclipse will occur on July 22, 2009.

The "seasons" of solar and lunar eclipses. The eclipse must have occurred on the first day of the lunar calendar. At this time, the Moon is located between the Earth and the Sun, but because the orbit of the Sun (ecliptic) and the orbit of the Moon (White Path) are at an angle of 5°9, not every new day there is a solar eclipse, and when a solar eclipse occurs, both the Sun and the Moon must be near the "yellow and white node" (ascending or descending node).

A solar and lunar eclipse must occur within a certain boundary of the yellow and white nodes of the new moon and the full moon, which is called the "eclipse limit". Calculations show that for a solar eclipse, a solar eclipse can occur if the crescent moon is within about 18 degrees near the intersection of the ecliptic and white paths; If the crescent moon is within about 16 degrees near the intersection of the ecliptic and white paths, there must be a solar eclipse. For lunar eclipses, a lunar eclipse can occur if the Moon is within about 12 degrees near the intersection of the ecliptic and the white path; If the Moon is within about 10 degrees of the intersection of the ecliptic and the white way, there must be a lunar eclipse.

Since there are two intersections of the ecliptic and the white path, and these two intersections are 180 degrees apart, there are two periods of the year when solar and lunar eclipses can occur, both of which are called "eclipse seasons", and they are half a year apart. The Sun moves about 1 degree east on the ecliptic every day, and since the eclipse limit of the eclipse is in the range of about 18 degrees, it takes about 36 days for the Sun to travel from 18 degrees west of the intersection of the ecliptic and the white path to 18 degrees east of the intersection of the ecliptic and the white way, that is, each eclipse season of the solar eclipse is 36 days. For a lunar eclipse, it is limited to about 12 degrees, so each eclipse season is only 24 days.

The annular solar eclipse canopy drama is staged.

When the three celestial bodies, the Sun, the Moon and the Earth, happen to be very close to a straight line at a specific moment, and the Moon orbits between the Sun and the Earth and obscures the Sun, a total solar eclipse occurs in the area of the Earth that completely falls into the shadow of the Moon.

Since the Earth's orbit is at an angle of 5 degrees to the Moon's orbit, at a certain time the Moon will move to a special position, connecting the Sun, the Moon and the Earth, and the Moon will just obscure the Sun's photosphere, thus forming a solar eclipse.

When the Moon orbits between the Earth and the Sun, the three of them are in a straight line, and the Moon's shadow is cast on the Earth. The central part of the shadow is thicker and is called the umbra; The surrounding area is relatively light. It's called penumbra. If you stand in the umbra, what you see is a total solar eclipse.

Because the moon obscures the sun completely; If you stand in the penumbra, what you see is a partial solar eclipse because the Moon only obscures part of the Sun; If the Moon's umbra is not projected on Earth, people in the area enclosed by the umbra extension can still see the edge of the Sun, that is, the Moon only obscures the central part of the Sun, a phenomenon called an annular solar eclipse.

The process of a total solar eclipse can include the following five periods: the first loss, the eclipse, the eclipse, the light, and the rebirth.

Solar eclipses occur every year, but because the total eclipse belt is a narrow shadow band, it is estimated that, on average, every 200,300 years, a region or city has a chance to be swept by the total eclipse belt, so a person who lives in a city may not have seen a total solar eclipse in his life.

To put it simply, the moon runs between the earth and the sun, blocking people's view of the sun from the earth, and some people on the earth can see a total solar eclipse, and some people can see a partial solar eclipse