According to media reports, on May 16 this year, the Blood Moon was staged again.
The blood moon, in fact, is a total lunar eclipse, when the earth, the moon, the sun travel to the same plane, and the earth is located in between, blocking the light of the sun to the moon, it will form a lunar eclipse. In general, when a lunar eclipse occurs, the obscured part will appear black, but when a total lunar eclipse occurs, the moon is not black, but a red moon, so it is also called a "blood moon".
Mainland warlocks believed that if the moon changed color, there would be disasters. Qing is worried about hunger, red is fighting and soldiers, yellow is virtue and joy, white is drought and mourning, black is water, and people are sick and die. That is to say, when the moon turns red, bad things will happen, so there is a saying called "blood moonrise, demons appear".
So the question is, is the "blood moon" that reappears after 4 months really an ominous omen?
Blood Moon
We can think of both the sun and the moon as rotating around the earth, of which the orbit of the moon around the earth is called: the white path, and the orbit of the sun around the earth is called the ecliptic.
The orbits of the ecliptic and the white path are not on the same plane, but there is a certain angle. Among them, when the sun, moon and earth move to the same plane, a solar or lunar eclipse occurs.
When the Earth moves between the Sun and the Moon, and the occlusion angle is large enough, it causes the lunar surface to be unable to receive the Sun's rays and darken. Supposedly, a total lunar eclipse should be black, but the special point is that the Earth has an atmosphere.
Newton proved with triangular prism experiments that sunlight is a composite light with 7 different photons, of which red photons have the longest wavelength and the strongest diffraction ability, so red photons will pass through the Earth's atmosphere to the lunar surface. The diffraction ability of other photons is not strong, resulting in their difficulty reaching the lunar surface, so the moon can only receive red photons and so on.
The moon will reflect a part of the red photons to the earth, so standing on the earth, we will see the moon turn red, which is the origin of the "blood moon".
Ominous?
In the past, the ancients paid attention to the unity of heaven and man, and would associate what happened in the sky with the evil luck and misfortune on the earth, such as: five stars out of the east to benefit China; comets dragging a long tail, known as "broom stars", thinking that the appearance of broom stars will bring bad luck.
In this context, people have thought of many ways to avoid disasters and avoid disasters, such as: In the past, people regarded "locusts" as punishment from heaven, and whenever a locust plague occurred, the local people only dared to "burn incense and worship in the fields and set up sacrifices but did not dare to kill".
Nowadays, we know that the formation of locust plagues is due to the excessive density of locusts, which triggers their social effect, resulting in swarms of locusts coming together and leaving, which is very harmful. In view of the characteristics of the formation of locust plagues, the mainland has adopted the methods of protecting the natural enemies of locusts and herding ducks to control locusts, which has fundamentally solved the possibility of locust plagues.
In fact, the formation of the "blood moon" is also a natural phenomenon like locusts, its appearance will follow the law, and scientists can calculate the time of the "blood moon" according to the law, no matter what happens in the future, as long as the blood moon will appear on the day.
As for what people called "ominous omens" in the past, in fact, the ancients did not understand the objective law of the emergence of the blood moon, and used the idea of the unity of heaven and man to forcibly associate the auspicious and evil blessings of the human world with the yin and yang of the moon.
Why is it black during a total solar eclipse?
Corresponding to the total lunar eclipse is the total solar eclipse, when the total solar eclipse occurs, the moon travels between the sun and the earth, blocking the light of the sun hitting the earth's surface, and the landscape of the total solar eclipse occurs.
Compared with the total lunar eclipse, the total solar eclipse is relatively rare, this is because the moon is too small, it is difficult to completely block the sun, so the annular eclipse and partial eclipse are relatively more, only when the moon blocks the sun to the greatest extent, there will be a similar effect of the total solar eclipse.
Unlike the blood moon, when a total solar eclipse occurs, it does not appear red. The reason is very simple, there is no atmosphere on the surface of the moon, and photons cannot enter the surface of the Earth through the moon, so they will turn black.
However, when a total solar eclipse occurs, many visions also occur, such as: mountain birds returning to the forest early, dogs barking, and owl abnormal activity, etc., the reason is because the sun suddenly disappears, making it difficult for animals to adapt, thinking that the night suddenly comes.
But it will return to normal in a little while, and we don't have to worry.