The causes of solar eclipses, what are the causes of solar eclipses

A solar eclipse is when the moon moves between the sun and the earth, and if the three are exactly in a straight line, the moon will block the sun's light from the earth, and the black shadow behind the moon will fall on the earth, and a solar eclipse will occur. People in the shadow of the moon on the earth (moon shadow: the shadow cast by the moon on the earth) began to see the sunlight gradually weakening, the sun surface was obscured by a round black shadow, and when the sky turned dark, when it was completely covered, the brightest stars and planets could be seen in the sky, and after a few minutes, the sunlight gradually appeared from the edge of the moon's dark shadow, and began to glow 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 all the sun, a partial solar eclipse occurs when part of the sun is occluded, and an annular solar eclipse occurs when part of the sun is occluded. A total solar eclipse lasts no more than 7 minutes and 31 seconds.

The maximum length of an annular solar eclipse is 12 minutes and 24 seconds. In order to extend the observation time of the total solar eclipse, an astronomer in France chased the shadow of the moon in a supersonic plane, extending the observation time to 74 minutes. China has the oldest record of solar eclipses in the world, and there have been definite records of solar eclipses more than 1,000 years BC.

Solar eclipses generally occur on the first day of the lunar calendar.

The Moon revolves around the Earth; The earth revolves around the sun. When the Moon turns between the Sun and the Earth, and the three celestial bodies are roughly in a straight line, the Moon's shadow is cast on the Earth. A person in the shadow of the moon cannot see the sun or can only see part of it because the moon obstructs their view, thus forming a solar eclipse.

The reason for a solar eclipse is that when the moon orbits the earth, when the moon happens to be between the sun and the earth, and the sun, moon and earth are almost in the same straight line, the moon obscures the sunlight and the moon's shadow falls on the earth, so a solar eclipse occurs.

Therefore, the time of the solar eclipse must be on the first day of the lunar calendar; But because between the white path (the Moon's orbit around the Earth) and the ecliptic (the Earth's orbit around the Sun), there is an average of 5°9'Therefore, not every new day will occur a solar eclipse, it must occur when the moon is within a degree of the intersection of the ecliptic and the white way, and this range is called the eclipse limit.

Because the Moon's orbit around the Earth is elliptical, the distance will be different, and the size of the Moon will vary depending on the distance of the Moon, as well as the position of the observer on the Earth, so that the solar eclipse phenomenon will be seen differently.

Solar eclipses occur because the Moon blocks the Sun's light towards Earth, where people see the Sun producing dark shadows. This is what the folk call the solar eclipse phenomenon, also known as the tengu eclipse day. In general, solar eclipses are divided into total solar eclipses, partial solar eclipses, annular solar eclipses, total annular eclipses, total annular eclipses, etc.

When observing the eclipse, be careful not to look directly at the sun with both eyes, otherwise it will cause great damage to the eyes.

1. Total solar eclipse Everyone knows that the moon will revolve around the earth, the earth will revolve around the sun, and the earth will rotate on its own. When the Moon moves between the Sun and the Earth, if the three are in the same straight line, the Moon will block the light coming to the Earth. If the sun's rays are completely obscured by the moon, the otherwise bright solar disk becomes a black shadow.

At this time, a total solar eclipse will occur, and the total solar eclipse must occur on the first day of the lunar calendar.

2. Partial solar eclipseA partial solar eclipse occurs if the Moon does not completely block the Sun's rays from the Earth. When a partial solar eclipse occurs, the observer falls in the penumbra of the moon, and people on Earth will see that part of the sun is obscured by the moon's shadow while the other part continues to glow, and the sun and moon only partially coincide. Typically, a partial solar eclipse occurs with other eclipse phases, such as a total solar eclipse or an annular solar eclipse.

3. Annular solar eclipseWhen the Moon orbits to apogee, the umbra cone of the Moon cannot reach the Earth, and the apparent diameter of the Moon is slightly smaller than that of the Sun. This is what we call an annular solar eclipse, or a golden ring solar eclipse. On June 21, 2020, a large-scale Golden Ring solar eclipse was staged across our country, and many people saw this scene.

Dear readers, have you ever seen a solar eclipse? Tell us about your experiences.

A solar eclipse, also known as a solar eclipse, is the movement of the moon between the sun and the earth, if the three are exactly in a straight line, the moon will block the light of the sun to the earth, and the black shadow behind the moon falls on the earth, and the solar eclipse phenomenon occurs.

When the sun, the earth, and the moon are basically in a straight line, and the moon is located between the sun and the earth, when the shadow of the moon falls on the earth, the moon covers the sun's rays, and the sun cannot be seen in the area within the shadow, this phenomenon is called "solar eclipse".

What is a solar eclipse? After reading this, you will understand and explain in detail the reasons for the formation of solar eclipses.

The moon moves between the sun and the earth, and if the three are exactly in a straight line, the moon will block the sun's light from the earth, and the dark shadow behind the moon will fall on the earth, and a solar eclipse will occur.

In folklore, this phenomenon is called the Tengu Eclipse Day. Solar eclipses only occur at the New Year, when the Moon and the Sun are conjunct. Solar eclipses are divided into partial solar eclipses, total solar eclipses, annular solar eclipses, and total annular eclipses.

You can't look directly at the sun when observing a solar eclipse, otherwise it will cause temporary blindness, and in severe cases, permanent blindness.

In 2020, there were two solar eclipses that could be observed worldwide, the annular solar eclipse on June 21 and the total solar eclipse in the early hours of December 15.

The reason for the formation of a solar eclipse is that the moon moves between the sun and the earth, and if the three are exactly in a straight line, the moon will block the light of the sun to the earth, and the black shadow behind the moon will fall on the earth, and the solar eclipse phenomenon will occur.

A total solar eclipse occurs only when the Moon is at perigee, when the Moon's umbral cone is longer than the distance between the Moon and the Earth, so that the umbral cone can sweep to the Earth's surface. Since the actual volume of the Sun is much larger than that of the Moon, a total solar eclipse is usually only visible in a very small area of the Earth, because the Moon's umbra is only a small dot to the Sun.

Under the sun's rays, the moon and the earth drag a shadow in the direction of their backs to the sun, and the moon sweeps across the ground, producing a solar eclipse, which must occur on the first day of the lunar calendar, that is, on the first day of the lunar calendar, the moon burrows into the earth's shadow, causing a lunar eclipse.

A solar eclipse, also known as a solar eclipse, is the movement of the moon between the sun and the earth, if the three are exactly in a straight line, the moon will block the light of the sun to the earth, and the black shadow behind the moon falls on the earth, and the solar eclipse phenomenon occurs.

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.First loss. The Moon moves faster than the apparent motion of the Sun. During a solar eclipse, the Moon catches up with the Sun. The eastern edge of the Moon has just been in phase with the western edge of the Sun"Contact"It is called the first loss, and it is the first time"Extrophic", which is a solar eclipse. Begin.

2.Eat both. Eclipse occurs after the initial loss.

From the beginning of the waning, the moon continues to move eastward, and the part of the sun's circle that is obscured by the moon gradually increases, and the intensity and heat of sunlight decrease significantly. When the eastern edge of the lunar surface is intangent to the eastern edge of the solar surface, it is called an eclipse. The sky direction is opposite to the east-west direction of the map.

3.Eat very much. It is the time when the sun is eclipsed deepest, and the center of the moon moves to the closest distance from the center of the sun; During a partial solar eclipse, when the Sun is most covered by the Moon, the position relationship between the two; During a total solar eclipse and an annular solar eclipse, the position relationship between the two centers when the sun is completely obscured by the moon and the two centers are closest to each other.

It also refers to the moment when the above positional relationship occurs.

4.Shine. The western edge of the Moon and the western edge of the Sun phases"Incision"The moment is called the birth of light, which is the end of the total solar eclipse; It usually 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 phase"Contact"The time is called the recircle, and from this time the moon is complete"Detachment"The sun, the end of the eclipse.

The moon itself does not emit light, therefore, under the light of the sun, there will be a long shadow on its back. When the Moon revolves around the Earth and turns between the Sun and the Earth, the Sun, the Moon and the Earth are exactly in a straight line, so that the Moon blocks some of the light shining on the Earth, or in other words, the Moon's shadow is projected onto the Earth. In this way, in areas where the moon's shadow sweeps, people will see a solar eclipse.

When the moon moves between the earth and the sun, and the moon's shadow falls to the ground, people in the moon's shadow zone can see the eclipse. The specific type of food depends on whether the specific shadow is a umbra, penumbra or pseudoumbra.

The Moon is between the Earth and the Sun, blocking the Sun's rays.

P.S. Because the moon's orbit is slightly deviated every month, there is not a lunar eclipse every month.

When the moon moves between the sun and the earth, if the three are exactly in a straight line, the moon will block the sun's light from the earth, and people who are in the shadow on the earth can only see part or all of the sun, so a solar eclipse occurs. Solar eclipses are divided into annular solar eclipses, partial solar eclipses, and total solar eclipses. That's all I know I happen to be taught about the universe by the teacher, and I ask for my approval o( o haha

Causes of solar eclipses (figure).

A solar eclipse is when the moon moves between the sun and the earth, and if the three are exactly in a straight line, the moon will block the light from the sun to the earth, and the dark shadow behind the moon will fall on the earth, and a solar eclipse will occur. People in the shadow of the moon on the earth (moon shadow: the shadow cast on the earth by the moon rocks) began to see the sunlight gradually weakening, the sun surface was obscured by a round black shadow, and when the sky turned dark, the brightest stars and planets could be seen in the sky, and after a few minutes, the sunlight gradually emerged from the edge of the moon's dark shadow and began to glow 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 all the sun's limbs, a partial solar eclipse occurs when part of the sun is occluded, and an annular solar eclipse occurs when the sun is partially occluded.

A solar eclipse is formed when the Moon moves between the Sun and the Earth, and the Moon partially or completely blocks the Sun's rays.

The solar eclipse is like a swift cluster, and the premature clump is full of oak and cherry blossoms.

So-called"food"It refers to the astronomical spectacle in which a celestial body is completely or partially obscured by another celestial body or its dark shadow. There are three main types of solar eclipses: total solar eclipses, partial solar eclipses, and annular solar eclipses. Solar eclipses occur on the principle that parts of the Earth are obscured by the shadow of the moon.

The eclipse must occur on the New Year's Day, the first day of the lunar calendar. This is because only on that day will the Moon appear on the line between the Sun and the Earth, so that it is possible for the Moon to block the Sun and form a solar eclipse. Similarly, a lunar eclipse must occur on the 15th day of the lunar calendar.

You may ask, why is there not a solar eclipse on the first day of every month, and why is there not a lunar eclipse on the fifteenth day of every month? This is because apart from the above conditions, there are several other factors that influence the occurrence of solar and lunar eclipses. We call the Earth's orbit around the Sun the ecliptic, and the Moon's orbit around the Earth the white path.

The plane of the ecliptic is not the same as the plane of the white plane, and there is an average angle of 5°09 between them, which can change at any time. A solar eclipse occurs only when the Moon orbits near the ascending and descending nodes of the ecliptic and white paths.

Types of solar eclipses.

There are three types of solar eclipses, namely: partial solar eclipses, annular solar eclipses, and total solar eclipses. The part of the Moon that covers the Sun is called a partial solar eclipse.

The moon only covers the central part of the sun, and a ring of solar surface is exposed around the sun, like a halo, which is called an annular solar eclipse. A total solar eclipse when the sun is completely obscured. The occurrence of these three different eclipses is related to the changing positions of the Sun, the Moon, and the Earth, and is also determined by the change in the distance between the Moon and the Earth.

The Moon is much smaller than the Sun, its diameter is about 1/400 of the Sun's diameter, and the distance between the Moon and the Earth is about 1/400 of the distance between the Sun and the Earth.

The orbit of the earth and the moon are elliptical, whether it is the distance between the sun and the earth, or the distance between the moon and the earth, it is not fixed, and sometimes it is farther, sometimes it is closer, so the length of the lunar umbra is also different, the longest time of the lunar umbra is 379,660 kilometers, the shortest time is 367,000 kilometers, and the distance between the earth and the moon is 356,700 kilometers at the closest time, and the farthest time is 406,700 kilometers. If at a certain point the lunar umbra is greater than the distance between the Earth and the Moon, a total solar eclipse can be seen in the strip of the Earth that is swept by the lunar umbra. If the lunar umbra is smaller than the distance between the Earth and the Moon, and the tip of the lunar umbra does not reach the Earth's surface, then an annular solar eclipse can be seen in the area swept by the small shadow cone (called pseudoumbra) extended from the tip of the shadow.

Partial solar eclipses can be seen in areas swept by the lunar penumbra, and the closer to the total eclipse area is within the partial eclipse zone, the greater the partial eclipse. Where the lunar umbra and penumbra have not been swept over, the eclipse cannot be seen at all.