Why are there solar eclipses? 5. Why are there solar eclipses?

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.

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 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 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.

Solar eclipses only occur when the Moon orbits between the Sun and the Earth. When it happens, 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.

Because the moon, the earth, and the sun are in a straight line.

The light emitted by the sun is blocked by the moon.

The light of the sun will not be visible from the earth.

This is where a solar eclipse is formed.

Because the moon blocks out the sun's rays!

Because it is obscured by the moon.

A solar eclipse (solareclipse), 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 sun's light to the earth, and the black shadow behind the moon falls on the earth, and the solar eclipse phenomenon occurs.

In folklore, this phenomenon is called the Tengu Eclipse Day (also known as the Tengu Swallowing 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.

A solar eclipse occurs when the moon, the earth, and the sun are in the same straight line, and are a natural phenomenon.

A solar eclipse, also known as 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 dark shadow behind the moon will fall on the earth, and a solar eclipse will occur.

Solar and lunar eclipses are typical examples of light propagating in a straight line in the same homogeneous medium. It is not always the case that the Moon moves between the Sun and the Earth, and two conditions need to be met for an eclipse to occur

1. Solar eclipses always occur on New Year's Day (the first day of the lunar calendar). Eclipses are not guaranteed on all New Moons, because the Moon's orbit (the white path) and the Earth's orbit (the ecliptic) are not in the same plane. The white plane and the ecliptic plane have an angle of 5°9.

2. Both the Sun and the Moon move near the intersection of the white and ecliptic paths, and the Sun is at a certain angle from the intersection (eclipse limit).

The research value of solar eclipses

The main reason why a total solar eclipse is valued is that it is of great astronomical value, because the moon will dim the originally dazzling sun and reveal the coronal layer that is not easy to observe. There have been many major astronomical and physical discoveries in the history of science that have been made using the opportunity of total solar eclipses, and only through such chances.

The most famous example is a total solar eclipse in 1919, which confirmed the correctness of Einstein's general theory of relativity. In 1915, Albert Einstein published what at the time seemed extremely difficult and implausible to understand and implausible, a theory that predicted that light would bend in a huge gravitational field.

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

Opportunity presented itself in 1919, but the total solar eclipse belt was far away and arduous in the South Atlantic. British astronomer Eddington set out with an expeditionary team of enthusiastic and curious people. The observations were in good agreement with Einstein's calculations, and the theory of relativity was recognized by the world.

The above content refers to Encyclopedia - Solar Eclipse Brief.