Astronomy hobby, when mankind discovered that the Andromeda Galaxy has the same planet as the Earth!

That's what you can't communicate. And to be honest, you can't find out if there's life there. All of our current efforts to detect extraterrestrial life are in the Milky Way.

And it is "near" in the Milky Way. It is to look for it at a distance of tens to hundreds of light years. No matter how far you go, even if you find it, it doesn't make much sense.

Not to mention extragalactic ones.

What did you observe? Telescope? It has taken 3 million years for light to reach Earth, that is, by the time you know that it has been 3 million years since that civilization, it is likely that it has perished, or evolved into a higher life form, and we cannot communicate...

This question is not naïve.

Judging from the current technology of human beings, they can only stare dryly. If there is a way to achieve synchronization if there is communication, it is particle tangling: when two particles that are entangled with each other in space, no matter how far apart they are in space, when one of them reacts, the other immediately reacts in the opposite direction.

This inference has been verified.

It's hard to communicate instantaneously, but Voyager 1 does.

Voyager 1 was launched on September 5, 1977, carrying a copper disc with a 12-inch thick, gold-plated surface containing a diamond phonograph needle. This means that even a billion years later, the record will sound as good as new. It includes greetings and various types of ** recorded in 55 human languages, in addition, there are 115 images on the disk, including ** of the planets of the solar system, images and descriptions of human sexual organs, etc., which are intended to express human greetings to "aliens".

The 55 human languages include very obscure languages such as ancient Mesopotamian Akkadian, and four Chinese dialects (Chinese, Xiamen, Cantonese, Wu). The greeting reads: "Greetings to the children of Planet Earth".

Greetings from then UN Secretary-General Kurt Waldheim.

The greeting of the then American ** Carter read: "This is a gift from a small world far away." It records our voices, our science, our images, our **, our thoughts and feelings.

We are trying to live our time and enter your time. ”

The album also includes a 90-minute vocal collection of sounds from the earth's natural world and 27 world-famous songs, including Chinese Peking Opera and ancient opera "Mountains and Flowing Water", Mozart's "Magic Flute" and Japanese shakuhachi.

From the perspective of the basic theory of the expansion of the universe, the principle of galaxies is inseparable from the expansion of the universe. However, not all galaxies are far away, dozens of dwarf galaxies such as Canis Major and their size Columbus Galaxy are all attracted by the Milky Way, and the Little Andromeda Galaxy is on par with the Milky Way at a speed of 110km s.

The attraction is still the "main force", but with the increase in spacing, the attraction core is likely to be slowly caught up by the expansion of the universe and have an advantage.

According to Einstein's quantum theory, the speed of light has always been considered to be the ultimate speed of the universe, and the fitness and movement speed of all objects with stationary quality has never been able to achieve or exceed the speed of light. In fact, except for the Milky Way and many surrounding galaxies that are close to each other under the effect of attraction, the entire universe has accelerated its expansion, and according to statistics, the expansion rate of the universe has long exceeded the speed of light. The longer the galaxy is separated from Earth, the faster it will degenerate, and some galaxies are far away from everyone long beyond the speed of light.

Galaxies are not always moving away, and the expansion of the universe does not prevent galaxies from impacting, because galaxies are not the larger attraction-constrained star structures in space. The expansion of the universe causes objects in the interior space to move at a relative speed, so most galaxies in the universe are completely far away, because the indoor space in the middle of each galaxy is constantly expanding, causing the galaxies to move away from each other.

The expansion of indoor space is also likely to cause proximity to each other, as is the case with the Andromeda Galaxy. It is because the degeneration rate caused by the expansion of the universe is about 53 km s, and the speed of the Andromeda galaxy is 110 km s, so the degeneration speed is indeed too small to endanger the speed of the galaxy approaching, so that the Andromeda system can get close to the Milky Way and produce an impact. It is unlikely that galaxies will be able to move faster than the speed of light if they are just chemicals, but because of the expansion of the universe, the speed of fitness movement is far away.

According to Hubble's fundamental law, when the spacing between galaxies reaches 14 billion light-years, the degenerative speed of galaxies will reach 300,000 km s, which will exceed the speed of light.

There are some celestial bodies that are also not expanding, and they are also moving, and according to their trends, they are close to us.

The main reason is that the universe is expanding, and every galaxy is actually moving at a high speed, and because there is a very large gravitational pull every week, so it is gradually approaching.

Because they are also moving at high speed, they are moving closer to us in the process of moving, which is also a gravitational factor.

That's because every galaxy in the universe has a different trajectory, so different things happen.

Our Milky Way is in orbit with the Andromeda Galaxy, which is very bad for the Milky Way, which is more than twice the size of the Milky Way. This collision will start in about 5 billion years, and the entire collision process will last for hundreds of millions of years, this collision is inevitable, and no force can stop this collision. There is a good chance that our Earth will be thrown out of the galaxy in this cosmic collision, or swallowed up by a super black hole at the center of the galaxy and destroyed.

However, in 5 billion years, the sun's lifespan will be close to death, and the earth may not be suitable for human habitation. Moreover, it is still unknown whether humanity will survive until that time, and perhaps the nth world war will destroy itself. In short, the landlord doesn't have to worry at all now.

There is no need to worry about the sky, when it endangers the earth, either the development of science and technology does not care about that harm, or people themselves perish, and the harm is gone.

Don't think too much, kid, wash and sleep.

Don't you have to be there to know the outcome of many things? It would be too much to underestimate human wisdom to ask such a question.

Although we have not flown out of the solar system, and we may not be able to fly out even within one or two hundred years, it does not affect our observation of the universe, and we understand the universe.

Just like thousands of years ago, we didn't go into space until the space age, but it didn't affect our observation of the sky and our understanding of the solar system. Especially in the last 1200 years, we can observe not only the moon and the sun through telescopes, but also large planets and many moons. Based on observations and calculations, we know the orbits and laws of several major planets, as well as the surface conditions of the planets, all of which we know before we fly out of the earth.

The understanding of the universe is the same, we can observe the universe through astronomical telescopes, through a variety of different bands, from the nearest star to the farthest galaxy, we can understand the composition of celestial bodies, surface temperature, motion laws, size, mass, etc.

For example, if we observe the Andromeda Galaxy, we can calculate its overall mass, as well as its direction and velocity. This is actually very easy, because on a cosmic scale, the Andromeda Galaxy is very close to us, so the accuracy of the observational data is also high.

Most of us are probably aware of the Doppler effect, which is that the sound of the sound can tell whether the train is coming towards us or moving away from us. Similarly, there is a similar effect in optics, called redshift or blueshift, where the spectrum of celestial objects flying towards us at high speed will be blueshifted. Celestial bodies that are far away from us will have a redshift in their spectrum.

Based on this principle, we can calculate that the Andromeda Galaxy is approaching us, and we can calculate that the relative velocity is about 300 kilometers per second.

Believe in science, understand science, and you can discover a lot of amazing phenomena. Science is rigorous and encourages questioning, but questioning is also about using the scientific method, not thinking.

Because this is based on the calculation and judgment of the orbit of the planets, such a basis is generated.

Humans use the Doppler effect to observe celestial bodies in the universe. A celestial body flying towards the Earth, this celestial body is blue in the spectrum, which is the phenomenon of blue shift; A celestial body that is moving away from the Earth, this celestial body is red in the spectrum, which is the phenomenon of redshift. The Andromeda Galaxy appears blue by observation.

Because human beings have advanced scientific instruments that can observe the trajectory of galaxies and calculate their orbits, they can judge that the Milky Way will collide with the Andromeda Galaxy.

Because our scientific power is very great, science is the study of secrets that have always been unknown to the universe, which is also the embodiment of a country's civilization and strength. We know that the star system we are in is the solar system, and there are many other planets, dwarf planets, and asteroids in the solar system. The sun originated 4.5 billion years ago.

At that time, there was a molecular cloud near the solar system that gradually formed the Sun after the gravitational collapse, while other corner debris formed celestial bodies, such as planets.

Unlike the formation of galaxies, the formation of galaxies is much more complex. Based on current observations, the Milky Way galaxy we are in is about 13.4 billion years old, and of course there will be some errors. This was not the case with the early Milky Way.

According to the current mainstream model of galaxies, the Milky Way could have its current size. According to current theories, the formation of galaxies was achieved through annexation after annexation, and in the past 10 billion years of history, the current scale should have been the annexation of many galaxies.

In addition, the Milky Way is still being annexed today, for example, the satellite galaxy of the Milky Way, the Sagittarius Galaxy, whenever it bypasses the Milky Way, some stars peel off and fall into the Milky Way, however, scientists**, the fate of the Magellan Galaxy, which is also a satellite galaxy, is similar to the fate of Sagittarius in the future, humans live on Earth in the Milky Way Solar System, and the largest galaxy closest to the Milky Way is the Andromeda Galaxy.

Because scientists have long realized that the Milky Way is steadily approaching its neighbor, the Andromeda Galaxy, and will eventually collide and merge within 4 billion years. However, according to a new study published in the Monthly Bulletin of the Royal Astronomical Society, the two galaxies are likely to merge 2 billion years in advance, in addition, the Sun we live in may fly out of the Milky Way and be captured by the Andromeda Galaxy, the merger of the two galaxies will occur before the Sun burns up, and astronomers in the solar system will be able to witness all this in the future.

The question of why humans can judge that the Milky Way will collide with the Andromeda Galaxy is explained here today.

Because the Sun we live in could fly out of the Milky Way and be captured by the Andromeda Galaxy, the merger of the two galaxies will occur before the Sun burns up, and astronomers in the solar system will be able to witness all this in the future.

Because humans can infer the trajectory of galaxies through the detection and observation of the universe, it can be judged that the Milky Way will collide with the Andromeda galaxy.

Because through years of data collection and computer calculations, the future direction of the Milky Way is speculated, and it will collide in the Andromeda Galaxy.