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Looking at the Milky Way from outside the Milky Way, the Milky Way is just a very ordinary galaxy, no different from other galaxies, and there are countless galaxies like the Milky Way in the universe.
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The Milky Way is a cluster of stars, some elliptical, some round, and all kinds of shapes, but the whole appearance has always been starry and radiant.
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Viewed from above, the Milky Way looks like a giant spiral-shaped disk, and from the side it looks like spilled milk.
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Outside the Milky Way are extragalactic galaxies, including the Great, McEllanic Wheeler Galaxy, Andromeda Galaxy, etc.
Beyond the Milky Way, it is called extragalactic galaxies, which refer to a place about 100,000 light-years away from Earth, of course, extragalactic galaxies do not refer to a single galaxy, in the universe, there are at least hundreds of millions of galaxies scattered in it, and there are many super structures.
Extragalactic galaxies are galaxies that are made up of a large number of stars outside the Milky Way. Because of the distance, it appears as a vague point of light on the surface, so it is also called the "extragalactic nebula". Extragalactic galaxies, like the Milky Way, are made up of a large number of stars, star clusters, nebulae, and interstellar matter.
About 1 billion galaxies similar to the Milky Way have been observed. According to their shape and structure, they can be divided into: spiral galaxies, barred spiral galaxies, elliptical galaxies and irregular galaxies.
The total number of extragalactic galaxies is estimated to be more than 100 billion. The most common classification of extragalactic galaxies was proposed by Hubble in 1926.
The main structure of the Milky Way
1. Silver heart. The geometric center of the Milky Way is the intersection of the Milky Way's axis of rotation and the galactic plane. It is a bright spherical protrusion in the center of the galaxy, about 20,000 light-years in diameter and 10,000 light-years thick.
In addition to being a geometric point, the silver heart also refers to the central region of the Milky Way.
2. A silver plate. The silver disk, the main component of the Milky Way, is a flat disk made up of stars, dust, and gas. Ninety percent of the detectable matter in the Milky Way is within the range of the silver disk.
3. Silver halo and silver crown.
The disk of the Milky Way is surrounded by a spherical silver halo with a diameter of 250,000,400,000 light years. Since the gas and dust on the disk absorb some wavelengths of electromagnetic waves, the composition of the silver halo is not clear. The disk is the active area where stars are born, but there is no such activity in the galactic halo, and open clusters are mainly found on the disk.
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Outside the Milky Way are extragalactic galaxies, including the Great, Small Geellanic Galaxy, Andromeda Galaxy, and other galaxies. A galaxy is made up of a large number of stars. Because of the distance, it appears as a vague hail spot on the surface, so it is also called an extragalactic nebula.
The Milky Way, a barred spiral galaxy where the solar system is located, is elliptical in the shape of an elliptical disk with a huge disk structure, and the Milky Way has four well-defined and fairly symmetrical spiral arms, which are 4,500 light-years apart.
The Milky Way passes through 25 constellations: Cygnus, Aquila, Fox, Sagittarius, Ophiuchus, Shield, Sagittarius, Scorpio, Tiantan, Ruler, Jackal, South Triangle, Compass, Fly, Southern Cross, Sail, Puttus, Monoli, Orion, Taurus, Gemini, Auriga, Perseus, Cassiopeia and Scorpio.
From the Earth, the center of the Milky Way is the purest and brightest area of the Milky Way, and its direction is in the constellation Sagittarius. From Sagittarius, a hazy white band of light seems to pass to the constellation Auriga on the back. The band of light then continues the rest of its path back to the vicinity of Sagittarius, dividing the celestial sphere into two roughly equal hemispheres.
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Outside the Milky Way are extragalactic galaxies, including the Great, McEllanic Rock Gaze Galaxy, Andromeda Galaxy, and other galaxies. A galaxy is made up of a large number of stars. Because of the distance, it appears as a vague point of light on the surface, so it is also called an extragalactic nebula.
Extragalactic galaxies, like the Milky Way, are made up of a large number of stars, star clusters, nebulae, and interstellar matter. There are as many as 100 billion galaxies observed, such as 1518-1520 Portuguese Magellan sailed around the world to the Southern Hemisphere, and found two large extragalactic nebulae (extragalactic galaxies) in the southern sky with the naked eye: the Large Magellanic Cloud and the Small Magellanic Nebula, which are the closest extragalactic galaxies to the Milky Way, and have a physical connection with the Milky Way, forming a triple galaxy.
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Is there anything strange about the shape of the Milky Way? If the Milky Way, like the solar system within it, revolves around the center in an irregular queue, that would be true. But no, the Milky Way's four main arms and multiple secondary arms revolve around the Silver Beam in a fixed shape.
According to the gravitational formula, two stars of the same mass in the outer and inner circles of the spiral arm have a smaller gravitational force in the outer circle because they are far away from the center of the galaxy, so they rotate slower than the inner circle, that is, the fixed shape of the spiral arm cannot be maintained in any way.
But the fact is that the fixed shape of the swivel arm is kept neatly. It exposed the first horse---feet dark matter.
Dark matter acts as an invisible glue, supplementing the lack of gravitational pull between the outer stars and the galactic core, keeping them in a neat formation.
Along the radius of the Milky Way, the further outward, the more material there is, and to maintain such a neat formation, the dark matter is linearly increasing along the radius of the Milky Way and towards the outer circle. It reveals a second horse---foot consciousness.
This is intentional. If I had to do it, I would have to use a computer to design a program that would increase the distribution linearly.
Spiral galaxies such as the Milky Way are very common in the universe, and most spiral galaxies have a fixed shape like the Milky Way, and they rely on the regular distribution of dark matter to maintain a fixed shape.
So, is the universe conscious? Whose consciousness?
The Milky Way and nearly 40 other galaxies that are not very far apart form a cluster of galaxies, all of which have a more or less mutual gravitational pull. Of these, the Milky Way and the Andromeda Galaxy are the two largest and closest galaxies, and the distance between them is only 2.5 million light-years Reference.
Give so many points, I'll also join in the fun. The landlord's question is of little practical significance, referring to the upstairs Du Kang and nostalgia. Bigger than China is the world, bigger than the world is the Earth-Moon system, larger than the Earth-Moon System is the Solar System, larger than the Solar System is the Milky Way, larger than the Milky Way is the total galaxy, and there is no definition of a universe larger than the total galaxy.
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