Five-star Gobang Super Blood Moon

I think it is caused by the movement of celestial bodies and the continuous operation of some celestial bodies. This is a very rare, very rare celestial situation.

Super Moon+Total Eclipse+Blood Moon

On May 26th, 20021year, the super moon+blood moon+total lunar eclipse all came, and people in most parts of China can witness this rare astronomical spectacle with their own eyes.

According to Beijing time, the whole process of super bloody total lunar eclipse is as follows.

Among them, we only need to pay attention to two time points. The first time was at 7: 09 pm, when the surface of the moon was completely covered by the shadow of the earth. The second time point is 7: 28 pm, and the moon begins to emerge from the shadow of the earth. So 19 minutes in the middle is the period when the moon is completely covered in the whole total lunar eclipse. However, because the earth will still refract some sunlight to the moon, it is called the blood moon.

Just now, the last paragraph only said when to read it, and briefly described what the blood moon is, but for most big friends and children who are very curious and curious, as a popular science article, it must be more comprehensive and detailed. Let's enter the "eating" link.

What is a super moon?

The cause of the super moon phenomenon is the simplest and easiest to understand among the three. You only need to remember two words: "nearest" and "roundest".

Among them, "recently" means that the moon runs near perigee.

Because we know that the orbit of the moon is not a standard circle, but also has perigee and apogee. The super moon on May 26th, which is the perigee of the moon, is only 357,000 kilometers away from the earth.

And this day happens to be the full moon, that is, when the moon is the most round, so it is called the super moon, and its apparent diameter is larger than the usual full moon 14%.

What is a blood moon?

As the name implies, the blood moon means that the color of the moon looks red.

But we know that the moon doesn't shine, and the moonlight we usually see is actually the sunlight reflected from the surface of the moon, so the red light of the blood moon is actually the reflected sunlight.

But how does the sunlight turn red? It's simple. Friends who know Newton's light dispersion experiment know that sunlight is not monochromatic light. Roughly speaking, it consists of seven colors: red, orange, yellow, green, indigo and purple. So, when there is a blood moon, something must have happened to these sunshine.

So what is this "accident"? Let's think about it carefully. Where will the sun pass when it hits the moon?

First of all, the space between the sun, the earth and the moon is empty. Secondly, the moon has no atmosphere, so the problem is handed over to the earth, because the earth was in front of the moon when the eclipse occurred, which is why the moon entered the shadow of the earth.

In this way, there is only one possibility that sunlight can shine on the moon, that is, what happens when sunlight passes through the earth's atmosphere, causing most of the light except red light to be "intercepted", leaving only red light to refract to the moon's surface.

So how is the earth's atmosphere intercepted?

There is a physical phenomenon called "Rayleigh scattering". Simply put, when sunlight passes through the atmosphere, gas molecules in the atmosphere will scatter light, and the intensity of scattering is inversely proportional to the fourth power of wavelength, that is, the shorter the wavelength, the stronger the scattering.

We know that the wavelength of blue-violet light is smaller than that of red light, so the longer the light stays in the atmosphere, the more "pure" the sunlight becomes. Finally, when it leaves the atmosphere, the only red light shines on the surface of the moon due to refraction, so human beings call it "blood moon".

What is a total lunar eclipse?

From the above, we should already know the core principle of the eclipse-the moon is covered by the shadow of the earth. If we understand it from the running position of the sun, the earth and the moon, it is the state of three points and one line.

But there are three kinds of eclipses, namely penumbral eclipse, partial eclipse and total eclipse.

The order of the three is from small to large according to the proportion of the moon's surface covered by the shadow of the earth, but before explaining it, we must first understand the shadow of the earth, because this shadow can be divided into two types, namely "penumbra" and "umbra", as shown in the following figure.

Now let's look at the penumbral eclipse. This lunar index finger indicates that the moon has been in the penumbra and has not entered the umbra of the earth. So for people on the ground, the moon is just a little darker than usual and is not easy to be noticed.

penumbral lunar eclipse

The partial eclipse of the moon is that only a part of the moon has entered the umbra of the earth, so the surface of the moon has never been completely "swallowed up" by the shadow during the whole partial eclipse.

partial eclipse of the moon

As for the total lunar eclipse, by analogy, the moon will all enter the umbra of the earth. If the refraction of light by the earth's atmosphere is not considered, the moon will be black and almost invisible to human eyes. However, due to the refraction and Rayleigh scattering of the earth's atmosphere just mentioned, the moon will appear red at this time.

total lunar eclipse

Extension point:

Some friends may have noticed the position relationship of "three points in a line" mentioned in the total lunar eclipse just now, and think that the period of the moon's revolution around the earth is about 27 days. Since three points on a line are necessary conditions for an eclipse or a total eclipse, logically speaking, shouldn't there be an eclipse every month? But this is obviously contrary to the facts, so what is going on?

That's a good question. In fact, the three-point line is the most vivid, but it lacks some accurate explanations. The most suitable thing is to judge whether the moon has entered the umbra of the earth.

However, the crux of the matter is that although the time for the moon to orbit the earth is 27 days, it does not mean that the moon will definitely enter the umbra of the earth once in less than 30 days.

The reason is that the orbit of the moon around the earth is not completely coincident with the ecliptic plane, which is the plane of the earth's revolution around the sun, and there is an inclination angle of about 5 degrees between them.

Therefore, strictly speaking, if there is going to be an eclipse, it must be the intersection of the moon's orbit around the earth and the ecliptic plane, which can roughly coincide with the connection between the sun and the earth. If they overlap, there is a probability of an eclipse, and this period is called the food season.

At this time, we imagine such a scene in our minds. When the earth makes one revolution, the intersection of the moon's orbit around the earth and the ecliptic will coincide with the connection between the sun and the earth twice, that is to say, the lunar eclipse in a year will be concentrated in two fixed time periods every year. Is that so?

Unfortunately, this assumption is wrong, because the moon is also disturbed by the gravity of the sun, so the orbital direction of the moon is also changing slowly at all times, so the period of overlapping between the intersection line and the solar-terrestrial line can not be estimated according to 365 days a year, but according to 346.6 days.

# Blood Moon # So finally, considering some other factors, the solar eclipse will start again every 19, because at this cycle point, the moon, the earth and the sun will be in the same position.

Ps: This article has a high density of knowledge points. I don't think everyone can finish reading much. Might as well make a video.

# Super Blood Moon will appear tonight #

Super blue blood moon picture

Why is it called "Super Blue Blood Moon"? Super blue blood moon, not blue moon, let's look at it separately.

"Super"

"Super" means that the moon people see on the earth is bigger and brighter. When the moon turns to the nearest point to the earth, it happens to be a full moon or a new moon. At this time, the moon we see on the earth is 14% bigger and 30% brighter than the general full moon, so it is called super moon. This phenomenon only occurs once every 14 months on average.

"blue"

It's not that the moon will turn blue, but there are two full moons a month. This year, 65438+ 10 1 is the fifteenth day of the lunar calendar, the full moon day; 65438+1October 3 1 is the lunar calendar1February 15, and it is also the day of the full moon, so the moon on March 3 1 is called the "blue moon", which is a spectacle that only appears once every 32 months.

Blood Moon

When there is a total lunar eclipse and the earth passes between the sun and the moon, there will be a blood moon. Because the thick atmosphere absorbs all other colors of light, only red light can penetrate. When the atmosphere refracts red light to the surface of the moon, it will make the moon appear slightly red, that is, "blood moon", and 65438+1October 3 1 this day happens to be a total lunar eclipse. The "blood moon" usually appears only once or twice a year.

Watching time:

The phase of this total lunar eclipse occurred from1October 3 19: 48 to 23: 12, and lasted for a long time. The total lunar eclipse lasted 1 hour 17 minutes. Almost all parts of our country can see the complete red moon stage, so there is no need to stay up late.

Although these astronomical phenomena can be seen every few years, it is extremely rare to combine the three phenomena!

20 18 Super Blue Blood Moon

Why does the super moon appear?

1, 20 18 Horror Astrology: The terrible legend of the blood moon is amazing, and five exoplanets will rush to the sun. Living in this era can be said to be super lucky. Although there are rumors that the horoscope of 20 18 is scary, this super blue blood moon that can only be encountered in 150 is quite strange, because it combines three scenes of super big moon, blue moon and blood moon, and the scope of this scene is quite wide, which can be encountered in some foreign regions.

The super blue moon is because the second full moon in a month is scientifically called "blue moon", not because the moon is blue. The reason why it also appears red is actually the result of the role of nature itself. First, the sun can't shine directly on the moon. The extremely thick atmosphere absorbs purple, blue, green and yellow and refracts light, which is the "red" moon we see. Once this phenomenon appears, it will be proved to be.

What does the blood moon herald?

1. According to experts, the blood moon hung in the air for nearly an hour on March1night, and the spectacle of the super blue blood moon lasted from 7: 48 pm to early morning 1 1. But the abnormal phenomenon of blood moon was not an auspicious thing in ancient times. No matter how brilliant it was at that time, some people still suspected that their appearance represented the meaning of good or bad luck. In many times in ancient times, people would predict the quality by observing different moons, and the blood moon that has already appeared indicates that something great will happen in the world.

2. The cycle of the moon's rotation will remind people of the relationship between big people or the fate of newborns. Historically, as long as the blood moon appears, it seems to be related to Jews. It's like the blood moon in 1948 when Israel was born. 1967, Israel successfully retaken Jerusalem in this war. 1492 recorded four blood moons, and Spain announced the expulsion order. Jews were asked to leave Spain forever within 14 days.

3. The ancients also thought that the appearance of the blood moon represented a disaster, which implied that there would be disasters and frequent unjust cases. In ancient times, there was a saying that "seeing blood on the moon is evil". In fact, however, the blood moon is only a natural phenomenon of total lunar eclipse. This is because the thick atmosphere absorbs other light and only refracts red light to the surface of the moon. All conjectures are groundless!

The two brightest moments of Venus

1, Venus is the closest planet to the Earth. 20 18 has two brightest times. The first time was September 2 1, which appeared in the western sky after nightfall with the title "Chang Geng Xing"; The second time, 65438+February 2, it rose in the east before dawn, and it has the reputation of "Ran Ran New Star", with the maximum apparent brightness and a magnitude of minus 4.9. Throughout China and even in most parts of the northern hemisphere, within 30 minutes after sunrise, if the sky is clear, you can see the rare phenomenon that Venus can compete with the sun with the naked eye.

2. The seventh largest distance of Mercury. In 20 18, mercury has seven large distances, four of which are in the west and three in the east. Mercury appears in 65438+1October 2, April 30, August 27 and 65438+February 65438+May, and can be seen in the east before sunrise. The easterly distance of Mercury appears in March 15, July 12, June165438+10.6, and the sunset can be seen in the west. Due to the declination difference between the sun and mercury, the distant dates of mercury, such as 65438+10.2, March/kloc-0.5, August 27 and June 65438+February/kloc-0.5, are suitable for observation in all parts of China and even in most parts of the northern hemisphere. Mercury's distant dates of April 30th, July 12,165438+1October 6th are suitable for observation in most parts of the southern hemisphere. Among them, on April 30th, in Australia, New Zealand, South Africa, Argentina and other countries, Mercury was the best in the world all year round. The naked eye can continuously observe mercury for more than 60 minutes.

The true legend of the blood moon

In fact, the "red moon" may appear at any time. At ordinary times, the moon is very low, and when it is close to the horizon, the sunlight reflected by it is influenced by the earth's atmosphere, and there is a certain chance to produce a "red moon", but at this time the moon is not necessarily "round" or the time of occurrence is not noticed.

As for the "red moon" produced during the total lunar eclipse, it is mainly because during the total lunar eclipse, the earth blocked the brilliance of the sun, and only part of the sunlight refracted by the earth's atmosphere shone on the moon, thus the "red moon" appeared.

Ancient legend in China: The red moon turns from yin to cold, indicating that the world is weak in righteousness, strong in evil spirits, strong in resentment and strong in hostility; The situation changes, and the mountains and rivers lament; There is chaos in the world, and there are fires everywhere; So: blood moon! Europeans believe that the blood moon will awaken the dark magic! Indians believe that the blood moon indicates disaster.

Eclipses have been taboo in geomantic omen in the East and the West since ancient times, and are regarded as unlucky images. In the East, because the sun symbolizes grace and the moon symbolizes punishment, an eclipse means that the state will treat people lightly and give them relief, while an eclipse examines whether laws and regulations are appropriate and may lead to unjust imprisonment. Or you can say you can pray for it.

Total lunar eclipse, the curse of the monarch; Partial eclipse is the curse of the main minister. Eating from the first half of the month is ridiculous for you; Since middle school, he has lost the orders of the prime minister; Bottom-up, lose for the general. Three eclipses on the moon, national mourning; From ten to fourteen, the world begins; Eat fifteen, and the world will die. Spring grain, poor harvest, general death; Summer grain, drought; Autumn grain, soldiers; Winter grain is the loss of state-owned soldiers.