When is an annular solar eclipse and how often is an annular solar eclipse?

In the sunlight, the moon and the earth drag a shadow in the direction of their backs to the sun. The moon swept across the ground, creating a solar eclipse. The eclipse must occur on the New Year's Day, the first day of the lunar calendar.

The angle of view of the Sun and the Moon is about half a degree, while the rotation of the Moon is 360 degrees, which is half a degree of movement every hour, that is, the position of the Moon, so the time from the beginning to the end of the eclipse is up to 2 hours.

That is, move the position of the moon for 2 months, and less if it is not a total eclipse. In addition, because the Earth rotates, the position of the Sun in the sky moves 15 degrees per hour, which means that within a range of 30 degrees, the Sun moves with the Moon at the same time, and a solar eclipse occurs at the same time.

An annular solar eclipse is a type of solar eclipse. It occurs when the central part of the sun is dark and the edges are still bright, forming a halo. This is because the Moon is between the Sun and the Earth, but it is far away from the Earth and cannot completely cover the Sun.

During an annular solar eclipse, the projections of objects sometimes overlap and overlap. On May 21, 2012, an annular solar eclipse appeared in the sky, and this annular solar eclipse can be observed in China for a maximum of 4 minutes and 33 seconds. In addition, on November 3, 2013, a total annular solar eclipse occurred in many parts of the world, and it is said that this total annular solar eclipse is the second total annular solar eclipse of this century.

On the afternoon of June 21, 2020, the astronomical landscape of "annular solar eclipse" appeared in the sky. The "eclipse" of this "annular solar eclipse" has reached the above, that is, more than 99% of the entire circle of the sun is occluded, which is almost close to a total eclipse. Such an "annular solar eclipse" is also known as a "Phnom Penh solar eclipse".

An annular solar eclipse occurs about once every 1-2 years worldwide and about once every 10 years in China.

An annular solar eclipse is also associated with the Earth and the Moon itself. Because both the Earth and the Moon are opaque spheres, the sun shines on the light and is sometimes blocked by the moon. An annular solar eclipse may occur on the first and second days of the lunar calendar.

The light emitted by the sun is blocked by the moon, and in the shadow zone of the moon, people cannot receive sunlight, so they cannot see the sun. And because the distance from the moon to the earth is different from the distance from the moon to the sun, and the moon is much larger from the sun than the moon from the earth, the moon covers the sun and only exposes part of the surrounding area, so an annular solar eclipse is formed.

In the 20th century, there were 73 annular solar eclipses, which means that there will be an annular solar eclipse in different parts of the world every three months or so.

There are at least 2 solar eclipses (partial solar eclipse, annular solar eclipse, or total solar eclipse) on Earth every year. The maximum number of solar eclipses per year is 5. According to statistics, between 1901 and 2500, there were an average total solar eclipse per 100 years in the world.

But for the same location, the chance of a total solar eclipse is about once in 300,400 years.

1. An annular solar eclipse is a type of solar eclipse. It occurs when the central part of the sun is dark and the edges are still bright, forming a halo. The essence of an annular solar eclipse is actually because the Moon is far away from the Earth, the Moon's umbra cannot reach the ground, and its extension passes through the ground, and people in the area of the umbra extension of the lunar shadow (artifact zone) can see the annular solar eclipse.

2. The next annular solar eclipse will occur on June 21, 2020.

1. Under the sun's rays, the moon and the earth drag a shadow in the direction of the sun with their backs to the sun. The moon swept across the earth, creating a solar eclipse. The solar eclipse must occur on the first day of the lunar calendar.

2. The viewing angle of the sun and the moon is about half a degree, and the moon's revolution is 360 degrees, which is half a degree of orange beam movement every hour, that is, the position of the moon, so the solar eclipse takes up to 2 hours from the beginning to the end.

3. That is, to move the position of the 2 moons, if it is not a total eclipse, the time is shorter. In addition, because the earth rotates, the position of the sun in the sky moves 15 degrees per hour, which means that within a range of 30 degrees, the sun and the moon move at the same time, and a solar eclipse occurs at the same time.