Rare! Red Aurora! Why do so many people love the aurora? Does it mean anything special?

On the evening of October 22 local time, in Finland.

The capital city of Lapland in the far north.

Rovaniemi, where the Northern Lights are enchanting.

In addition to the usual green auroras, red auroras were also seen that night.

Rare! Red Aurora! Why do so many people love the aurora? Does it mean anything special? Let's look down with this question in mind!

Aurora is a plasma phenomenon that occurs due to a stream of charged particles from the sun (solar wind.

Enter the Earth's magnetic field.

Brilliant and beautiful light at night in the high altitude near the Earth's north and south poles (an area of 10° to 20° from the Earth's magnetic pole in longitude and about 3° to 6° wide in latitude). Auroras occur not only on Earth, but in the solar system.

There are also auroras on some other planets with magnetic fields.

The reason why the Earth's aurora is mainly red and green is because of the nitrogen and oxygen atoms in the thermolayer.

Excited by electrons, they emit red light and green light respectively, and different heights will radiate different colors. In general, the red aurora can only be seen when the sun is very active, and only at the top of the curtain-like aurora.

Aurora is a type of visible light.

They can be easily seen with the naked eye, because the aurora has a uniform arc aurora, a ray beam aurora, a ray arc with aurora, a curtain aurora, an aurora crown and other various forms, as well as red, yellow, pink, green, blue and purple and other gorgeous colors, so many people like the aurora and take "watching the aurora once" as a tourist goal.

The aurora is a natural phenomenon, essentially a process of large-scale electrical discharge around the Earth, so from a scientific point of view, it does not have any special meaning.

To sum up, the aurora and even the red aurora are just a natural phenomenon, without any special meaning, and many people like the aurora probably because it feels very romantic.

Because the aurora is very rare, many people think that watching the aurora is particularly romantic, and they may only see it once in their lifetime. The aurora represents happiness, but also your dreams and hopes.

It's because the aurora makes you feel warm and makes you feel like it's an auspicious sign. Something good will happen in the future.

Maybe it's because they think it's beautiful, and it's hard to see, after all, you can only see it on TV, and it's not very real. It is to be able to bless

Red aurora occurs when the solar wind reacts with oxygen, usually more than 150 miles. However, red aurora is extremely rare. The red aurora borealis in particular brings good luck.

Aurora or Polar Light or Northern Light is a brilliant and colorful luminous phenomenon that appears above the high magnetic latitude of the planet. Earth's auroras, on the other hand, are produced by the excitation (or ionization) of molecules or atoms in the upper atmosphere by a stream of high-energy charged particles (solar wind) from the Earth's magnetosphere or the Sun. There are three conditions for the aurora to occur:

Atmosphere, magnetic field, solar wind. All three are indispensable. Auroras are not only found on Earth, but also on some other planets in the solar system that have magnetic fields.

It is a colorful plasma phenomenon that occurs due to the flow of charged particles (solar wind) from the sun into the earth's magnetic field, and the brilliant and beautiful light that appears at night in the high altitude near the north and south poles of the earth.

Auroras will show a variety of color changes in different environments, different climates, and different times, and scientists have found that the color of the aurora is determined by the following four factors:(1) the energy of the incident particle; (2) the distribution of atoms and molecules in the atmosphere at different altitudes; (3) the characteristics of the atoms and molecules themselves in the atmosphere; (4) The density of the atmosphere is uneven, basically the closer you get to the surface, the higher the density.

The energy of the incident particle determines the depth at which the particle can rush into the atmosphere, and therefore the height at which the aurora is generated. The change in atmospheric composition with altitude determines which atoms or molecules the incident particles are likely to hit, and therefore the wavelength of the aurora that may be emitted. In addition, the properties of the atmospheric particles themselves are also important, and these properties directly determine the color of the light emitted.

In addition, the density of the atmosphere also affects the color of the aurora. Due to the lower density of the upper atmosphere, the process of emitting light is not disturbed by atoms and molecules colliding with each other. However, the closer to the surface, the denser the atmosphere, and the more frequent the collision between molecules, which makes certain wavelengths of light less likely to be produced.

One of the main factors that determine the color of the aurora is the vertical distribution of different types of molecules in the atmosphere. Closer to the surface, the composition of the atmosphere is very homogeneous, with 78% nitrogen and 21% oxygen, up to an altitude of about 100 km. Higher up, the sun's high-energy ultraviolet rays break down atmospheric molecules into atoms, which are distributed differently by gravity, with lighter atoms distributed in the upper layers.

At the very top of the atmosphere, about 500 kilometers above the surface, hydrogen and helium atoms make up the majority; between 200,500 km from the surface, oxygen atoms have the highest number; Between 100 and 200 km, the number of nitrogen molecules is the largest, and the rest is mainly oxygen atoms and oxygen molecules; 60,100 km is mainly composed of oxygen and nitrogen molecules.

Knowing the above atmospheric distribution, you can guess that the aurora at an altitude of 60 100 kilometers should have the main light from oxygen and nitrogen molecules; The 100 200 km aurora is mainly contributed by nitrogen molecules and oxygen atoms; At more than 200 km, the aurora mainly comes from oxygen atoms, and a small part from nitrogen molecules; In the highest layers of the atmosphere, hydrogen and helium atoms also produce auroras, but these lights are so faint that they are not easily visible to the naked eye.

Auroras are produced by the earth's magnetism, and there are many colors because of magnetic energy.

Each gas emits its own color of light. This color is like a human fingerprint, because no two gases emit the same color of light, and we call this unique light the "spectrum" of gases

Because all light has many colors, we just don't see it.

Because the color of the aurora will be different in different situations, this is related to many factors.

Because of such a special dimension near the pole, the sunlight is refracted in many colors.

Because of refraction, under the refraction of light, there will be many colors.

I think it still has only one color, just because of the refraction of light.