The solar eclipse was predicted by the Gregorian calendar.

The moon revolves around the earth, and the ellipse is the orbit of the moon around the earth, which is the white plane. The earth revolves around the sun, and this plane is the plane on which the earth revolves around the sun, that is, the ecliptic plane. There is a five-degree angle between these two planes, which is the intersection of yellow and white. At least twice a year, the sun, the moon and the earth will just turn in the same straight line.

When the moon comes between the sun and the earth, there will be an eclipse. We can see the news of solar eclipse every year. Interestingly, why do we sometimes see total solar eclipse and sometimes annular solar eclipse? The scientific answer is purely coincidental. Coincidentally, from the earth, the size of the sun and the moon is just about the same, the diameter of the sun and the moon is 400 times different, and the orbit of the moon around the earth is elliptical. If the moon is just near the earth when the eclipse occurs, the distance between the earth and the moon will be 4 10 times different. So at this time, the moon looks a little bigger than the sun, which can block all the sun, and we will see the total solar eclipse.

And if the moon is just on the far side of the earth when the eclipse occurs, the distance between the earth and the moon will be 370 times different. At this time, the moon looks a little smaller than the sun and can't completely block the sun, so we saw the annular eclipse. On average, you can see a total solar eclipse or an annular solar eclipse in the same place on earth every 375 years. In the next 100 year, there will be wonders of total solar eclipse in many places in China, of which total solar eclipse and ring stones account for almost half.

However, in a few hundred million years, there will be more and more annular eclipses, because under the action of tidal force, the moon is moving away from the earth at a speed of 3.8 centimeters per year, so from the earth's point of view, the moon will keep getting smaller. If humans are still on the earth after 600 million years, your descendants will find that the moon can't completely cover the sun, the total solar eclipse will completely disappear on the earth, and all solar eclipses will become the annular eclipse you see today.