Lunar and solar eclipses, what are solar and lunar eclipses?

Visible range: The eclipse table gives the solar eclipse visible from the thirteen historic cities in the Central Plains in the range of 107 to 120 degrees east longitude and 30 to 41 degrees north latitude.

First loss direction: Solar eclipse The sun loses first to the southeast.

There are three types of solar eclipses: total, partial, and annular eclipses.

What it looks like:

Lunar Eclipse Visible Range: The lunar eclipse will be visible throughout the country.

Occurrence time: Lunar eclipses occur up to 3 times a year, and sometimes none of them occur According to astronomical calculations, the entire process of the total lunar eclipse that occurred on the 28th is: at 16:51, the moon begins to enter the earth's umbra, and at 17:52, the entire moon is obscured by the earth.

Duration: As early as ancient times, the Babylonians, based on long-term statistics of solar and lunar eclipses, discovered that the occurrence of solar and lunar eclipses had a cycle of 223 synodic months. This 223 synodic months.

Generally speaking, the duration of the solar and lunar eclipse is related to the position of the sun, moon and earth at the time of the eclipse and the position of the observer.

First loss direction: lunar eclipse, loss east and west.

Type: Lunar eclipse There are only total lunar eclipses and partial lunar eclipses.

What it sees: The moon will darken first, and then it will change back to its original shape.

Solar Eclipse:

A solar eclipse, also known as a solar eclipse, is the Moon.

Moving between the sun and the earth, if the three are exactly in a straight line, the moon will block the sun's light towards the earth, and the black 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 and total solar eclipses.

Annular solar eclipse, total annular eclipse. 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.

Lunar Eclipse:

A lunar eclipse, also known as a lunar eclipse.

When the Moon moves into the Earth's shadow (the shadow is divided into umbra and penumbra), some or all of the parts that could have been illuminated by the sun's rays cannot be illuminated by direct sunlight, making it impossible for observers on the Earth to see the ordinary moon phase.

astronomical phenomena.

When a lunar eclipse occurs, the Sun, Earth, and Moon happen to be or almost in the same straight line, so the eclipse must occur on the night of the Full Moon (lunar calendar.

Ten. Five, ten.

vi, or xvii), as in the Sayings.

As the saying goes, "a solar eclipse is a new one, and a lunar eclipse is a hope."

The Earth's shadow is located at the Earth's rotation.

In the orbital plane (ecliptic plane), this plane does not coincide with the lunar orbital plane (white plane), and the angle of intersection of the yellow and white planes is about 5 degrees; During most Full Moons, the Moon is not in the ecliptic plane, but is either north or south, not in the Earth's shadow, so not every Full Moon eclipse occurs. Lunar eclipses occur at least twice a year around the world.

May 26, 2021, "Supermoon + Red Moon."

Total Lunar Eclipse" was unveiled in groups.

When the moon passes in front of the sun, the shadow of the moon is cast on the earth. Its projection on the Earth is so small that it can only obscure a small area of the ground, which is only about 160 kilometers or even smaller. In other words, you may be able to see the entire Sun disappear, but others a few kilometers away may see that the Moon is only partially obscuring the Sun, which is a "partial solar eclipse", while people further away may not see the eclipse at all.

As the Moon moves, the Moon's shadow will change position on the Earth's surface, but the area it passes on the ground is only a small fraction of the Earth's surface, and it only lasts for about 7 minutes at most, no matter where it is. The sun and moon look different sizes no matter where they are in the sky. Because the Moon is smaller than the Sun, it cannot completely obscure the Sun when it is between the Earth and the Sun, and at this time, we will see a dazzling ring of light around the Moon's shadow, which is what we commonly call an "annular solar eclipse".

At some point, there will also be a lunar eclipse. This phenomenon only occurs on full moon days, when the sun and moon are on opposite sides of the earth and in a straight line. Because the Earth is larger than the Moon, its projection is also larger than that of the Moon.

When the Earth's projection can obscure the entire moon, a lunar eclipse is possible. At this time, people who are directly facing the moon can see the lunar eclipse. Lunar eclipses also last a bit longer than solar eclipses.

In addition, lunar eclipses do not occur every full moon because the moon and the sun have different orbits and cycles. Usually, on full moon days, the projection of the Earth passes above or below the moon. And only when the Sun and Moon are in the same line, there will be a lunar eclipse.

The record of a lunar eclipse in Mesopotamia in 2283 BC is the earliest in the world, followed by the Chinese record of a lunar eclipse in 1136 BC. The phenomenon of lunar eclipses has been driving the development of human understanding. As early as 1881, Zhang Heng, an astronomer in the Han Dynasty of China, figured out the principle of lunar eclipses.

In the 4th century BCE, Aristotle observed that the shadow of the Earth was round when he observed a lunar eclipse, thus inferring that the Earth was spherical. The ancient Greek astronomer Aristarchus in the 3rd century BC and Ibargos in the 2nd century BC both proposed the determination of the relative size of the sun-earth-moon system by lunar eclipses. Iba Valley also proposed to measure geographic longitude by observing lunar eclipses at the same time in two places far apart.

In the 2nd century, Ptolemy used ancient records of lunar eclipses to study the movement of the moon, a method that continues to this day. Before the advent of rockets and artificial Earth satellites, scientists had been exploring the Earth's atmospheric structure by observing lunar eclipses.

A lunar eclipse differs from a solar eclipse in four ways. 1. The causes are different.

Solar 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 then the solar eclipse phenomenon occurs.

Lunar eclipse: A lunar eclipse is a special astronomical phenomenon that refers to the area between the Moon and the Earth when the Moon moves to the shadow part of the Earth, because the sunlight is blocked by the Earth, and a piece of the Moon is missing.

2. There are different types of inclusions.

Solar eclipses: Solar eclipses are divided into four types: partial solar eclipses, total solar eclipses, annular solar eclipses, and total annular eclipses.

Lunar eclipses: Lunar eclipses can be divided into three types: partial lunar eclipses, total lunar eclipses, and penumbral lunar eclipses.

3. The time of occurrence is different.

Solar eclipse: A solar eclipse generally occurs on the first day of the lunar calendar.

Lunar Eclipse: Lunar eclipses can only occur around the 15th lunar calendar.

4. Observe different moral phenomena.

Solar eclipse: Total solar eclipse and annular solar eclipse have five processes: initial loss, eclipse, eclipse, light, and recirclement, while partial solar eclipse only has three processes: initial loss, eclipse, and recirclement.