In ancient times, human beings thought that the corner of the world was the whole of the world, and after enlightenment, they thought that the country they were in was the whole of the world, and it was not until 400 years ago, when people first used the telescope to observe the stars of the universe, that they knew that the universe was so vast.
The sun gave the earth light and heat, so for a long time, everyone regarded the sun as the core of the universe, and the solar system was already the entire universe. However, with the continuous development of science and technology, we have found that the sun is just an ordinary star, the solar system is also one of the hundreds of billions of galaxies in the universe, and the entire solar system belongs to the Milky Way.
After fully exploring the basic situation of the solar system, people set their sights on the Milky Way and wanted to take a "360-degree panorama of the Milky Way" to make it easier for astronomers to study. After setting up multiple telescopes and launching many probes, only one panorama of the Milky Way has been obtained, or through synthesis.
So are the other pictures fake? Yes, while some of them may seem real, they are only what astronomers envisioned the Milky Way, or PS and synthesis based on pictures of other galaxies observed.
<h1 class="pgc-h-arrow-right" data-track="411" > the Milky Way</h1>
Hubble as the father of infrared telescopes, after observing many galaxies, according to their appearance of the classification and naming, by the elliptical galaxy, spiral galaxy, irregular galaxy, lens galaxy these four categories of composition, the Milky Way belongs to the spiral galaxy. This is also why when we look at the picture of the Milky Way, we think that it is a vortex, the difference is that it also belongs to the bar rotation galaxy under the subdivision, because there is a "stick" in its center.
The Milky Way, which belongs to a typical barred spiral galaxy, is mainly composed of a silver core, a silver core, a silver disk, a silver halo, and a silver crown, while the overall observation is extended outward by the central rod structure, and there are multiple spiral arms outside, and the solar system is located on the Orion spiral arm. For example, the solar system is roughly the location of the three rings at the center of the Milky Way, so we are not really a special existence for the Milky Way, just ordinary residents living in the remote area outside the three rings.
The Milky Way is more than 10 billion years old, with stars accounting for 90% of the mass, leaving it composed of impurities such as dust. The main part is a silver disk, accounting for more than 85% of the total mass of the Milky Way, the shape of the silver disk is flat oval, thick in the middle, thin on the outside, and the center is the appearance of a convex lens, with a diameter of about 82,000 light years, with an average thickness of 10 million light years.
If the solar system were to rotate around the galactic center at a speed of 250 km/s, it would take about 250 million years to rotate completely, enough to see how big the Milky Way really is.
Among them are distributed more than 200 billion stars, they all have their own planets and satellites, after astronomers observe, the solar system around a single star for the rotation of galaxies is still relatively rare, can only say that the various planets in the solar system are very "specific", but the fundamental reason is that the volume of the sun accounts for 99.86% of the solar system, the huge gravitational force makes the planets want to revolve around other stars can not.
At present, people's detection of the Milky Way is still very limited, we only know that it is "alive", has been rotating motion, but "poor rotation", under this rotation of different parts of the angular velocity is different, which means that there will be a huge difference between galaxies on different spiral arms. During his trip around the globe, the famous navigator observed two companion galaxies of the Milky Way, which were named after him, namely the Great Magellanic Galaxy and the Magellanic Galaxy.
In this way, the Milky Way, as a huge galaxy containing hundreds of billions of solar systems, will be more complex in its structure, and scientists have also inferred that there is a huge black hole in the center of the Milky Way, which is constantly devouring the celestial bodies around the central rod structure. Although the Milky Way can be counted as our next-generation parent galaxy, everyone has always been very curious about its overall appearance, but it is too difficult to take a full-body photo of it without dead ends!
<h1 class="pgc-h-arrow-right" data-track="418" > "true full body photo"</h1>
Now you open the browser to search for "360-degree panorama of the Milky Way", there will be countless pictures popping up, they seem to be in line with our above interpretation of the structure of the Milky Way, it seems to be in line with everyone's mind of the galaxy, but unfortunately, they are almost all fake.
The true panorama of the Milky Way was taken by the Spitzer Space Telescope, and it is not just 1, but a composite of 2 million photos. Before officially viewing this composite photo, let's introduce the tool that photographed it, the Spitzer Space Telescope.
As we all know, ordinary telescopes cannot observe celestial bodies in the universe, and only telescopes with special light such as infrared can see. It is the largest infrared telescope that humans have sent to space, named after the astrophysicist Lehmann Spitzer, launched on August 25, 2003, and it now shows us many colorful pictures of the universe.
NASA released this 360-degree panoramic digital picture of the Milky Way, which the Spitzer telescope has taken at various angles over the past decade, through synthetic technology, pieced together the 2 million photos into a full-body photo of the Milky Way. This includes about 50% of the stars in the Milky Way, and the rest may be too small or too tricky to be photographed. This image, which is about 20 billion pixels, would cover an entire football field if it were to be printed for exhibition.
In addition to the synthetic panorama published above, humans do not have the ability to take more panoramas of the Milky Way, is it because the technology is not in place? What other restrictions are there?
<h1 class="pgc-h-arrow-right" data-track="423" > the cause of the "panorama of the Milky Way"</h1>
Why are the Panoramas of the Milky Way almost all fake photos? Because we can't escape the reality of "not knowing the true face of Lushan Mountain, only because we were born in this mountain", as mentioned above, the solar system is just a small galaxy outside the three rings of the Milky Way, and human beings want to take a panoramic view of the Milky Way galaxy must stand at an angle that can be overlooked, accurately flying out of the Milky Way, and shooting after this. But unfortunately, we don't even have the ability to fly out of the solar system now.
At this time, someone must have said, flying out, ah, didn't the American Voyager One have flown out of the border of the solar wind? Here we need to understand the definition of the boundary of the solar system, there are two kinds, one is represented by the solar wind, but the scientific community more agrees with the definition of the solar system boundary represented by the "Ault Nebula".
Voyager One, which has already run out of energy in 2020 and is still hundreds of times farther away from the Oort Nebula, so as cruel as this argument is, we really didn't fly out of the solar system. How can humans, who have not even flown out of the solar system, take full-body photos of the wider Milky Way? Obviously impossible.
Therefore, what we can do is to stand in the position of the solar system, observe the appearance of the Milky Way from all angles, and then combine the appearance of other galaxies observed by infrared telescopes, imagine the appearance of the Milky Way, and use the computer to map and synthesize. Most of the panoramic photos of the Milky Way that you see come from this way, of course, there are also pictures of many other galaxies, such as the Andromeda galaxy and so on. But even if these photos are all composite PS, it cannot be said that they are "completely fake photos". Because the general structural appearance is actually 90% similar to the real Milky Way, it can meet our needs for understanding the structure of the Milky Way.
For ordinary people who do not understand astronomy, it is true that fake photos look more pleasing to the eye and more convenient for us to study the Milky Way. It can be seen that in fact, true or false is not particularly important, and the synthesis cannot be regarded as a real "fake photo".
However, in the future, there will be more excellent space telescopes like the "Spitzer Telescope", perhaps under the continuous progress and development of science and technology, it can carry a deep space probe like "Voyager One", fly out of the solar system, and even fly out of the Milky Way, where to find a perfect angle, to take a "full body photo" of the Milky Way.
< h1 class="pgc-h-arrow-right" data-track="429" > the history of observations in the Milky Way</h1>
In 1609, Galileo Galilei, known as the father of modern science, aimed his telescope at the Milky Way, the first time humans discovered the existence of the Milky Way, which originally contained so many stars. The first person to make actual observations of the Milky Way, and the person who modeled the Milky Way, was the British astronomer William Herschel. He was also the discoverer of Uranus, with more than 400 homemade telescopes during his lifetime.
In 1785, he published the first model of the Milky Way in history, arguing that the Sun was in the middle of the Milky Way, now known as the position of the Silver Star. Obviously this understanding is wrong, but the model points out that the Milky Way is a disk-like structure and later research, so Herschel is also known as the "father of stellar astronomy".
Since then, more observations have been made of the Milky Way, such as Captan's model of the Milky Way published in 1922, which details the shape, diameter, and number of planets it contains. In 1918, American astronomers studied the distribution of globular clusters and concluded that the solar system was not at the center of the Milky Way, but in a more remote place. With this conclusion, the exploration of the Milky Way has been smoother for human beings, knowing that they must stand in their position and observe the Milky Way from various angles.
<h1 class="pgc-h-arrow-right" data-track="433" > the future of the Galaxy</h1>
Among the many ideas about the destruction of the earth, in addition to the more common planetary impact, the expansion of the sun, the aging and extinguishing of the sun, the human beings who open the pattern are more focused on the milky way, and the destruction of the milky way undoubtedly represents the destruction of the earth. Through observations, it was found that the Andromeda galaxy adjacent to the Milky Way is constantly approaching, possibly in 6 billion years, colliding with the Milky Way and forming a larger elliptical galaxy.
At this time, where the solar system should go, no one knows. Obviously, human beings still know very little about the evolution of celestial bodies, and we have not yet figured out the origin of the milky way, let alone the accurate future direction. Compared to the Milky Way, Earth is probably only a tiny bacteria, and we really don't need to worry about the future of the Galaxy here.
<h1 class="pgc-h-arrow-right" data-track="435" > conclusion</h1>
The panorama of the Milky Way needs to stand outside the Milky Way to shoot under the perspective of God, perhaps the higher civilizations that exist in the extragalactic galaxy have already helped us take pictures and deposit them in the document, looking forward to human beings beings can fly out of the solar system under the development of science and technology, and then fly out of the Milky Way, taking us to see how beautiful the brilliant Milky Way is.