The Earth received a strong signal from 1.3 billion light-years away. It was sent 51 times. Do you want to reply?

Have you ever imagined that one day, we can hold a satellite phone and communicate with others across the planet? If humans realize interstellar migration in the future, this possibility may still be realized. But what if there was an alien on the other end of the phone?

Human beings have installed many radio telescopes on the earth to study some interstellar changes in the universe and the time response of matter. The principle is to capture and emit radio electromagnetic waves and analyze the information expressed in them. In addition, such equipment has another function, which is to find aliens.

Since humans built the Big Brother radio telescope, many things in the universe seem to have become simpler and more complicated.

We have used electromagnetic wave information to discover many interstellar phenomena that have not been observed before, and we can also contribute to the popular aerospace industry based on some planets. At the same time, many mysterious radio signals from deep space were also received. Could they be aliens? Do we want to reply?

What can radio signals do? Radio itself is a radio frequency electromagnetic wave that can propagate in free space (both the vacuum of the universe and the earth's atmosphere). It can convert the audio, text, data, images, etc. we want to convey into electrical signals and modulate them in the radio On waves, propagation or communication in free space is realized.

Because the transmission speed of radio electromagnetic waves is almost the same as the speed of light, and can basically circle the earth more than 7 times every second, it is very convenient for us to use radio to spread information on the earth. In space, this method of information transmission is still applicable.

Human beings receive mysterious radio messages from the universe almost every year. Some of them are electromagnetic wave signals with no structure, no rules, random strength and weakness, and some seem to have certain rules, which makes people confused. I feel like there are traces to follow.

For example, the recurring FRB 20201124A electromagnetic wave information has repeated signals of almost the same frequency at least 51 times. According to the detection of astronomers, this signal comes from outer space approximately 1.3 billion light-years away and does not belong to the Milky Way. This should be classified as "cross-server communication".

What causes this? Could it be a temptation given to humans by aliens?

"Aliens" may be a subconscious signal that humans gradually develop to look for similar species because they are truly aware of the vastness of the universe (of course this is a personal opinion). We have added human information to many astronomical equipment, hoping that when encountering aliens, we can at least release a relatively friendly signal.

From various legends to some reports and books that are not known to be true or false, the topic of aliens has never cooled down on the earth.

The Voyager sailing in space carries metal records engraved with human information and travels alone in the vast universe. Humans on earth are also using radio telescopes to observe and monitor " sound". Could there be a kind of electromagnetic wave that aliens use some kind of powerful equipment or emit intentionally? There may be infinite possibilities in the universe.

However, according to common sense, during the long period of time when human beings have developed civilization, we have launched and left a lot of man-made substances in space, many of which are still orbiting or have been abandoned and temporarily collected. Satellites and detectors that are not coming back have left many traces of human civilization in the small part of the universe where we live.

If aliens can also emit radio electromagnetic waves, it means that the development of their civilization is at least in sync with humans. However, we have never found any "satellites" or "detections" made by aliens in the universe. utensils" and the like. Have they developed to a stronger level and hidden themselves?

If this is really a possibility, should humans reply to their signals?

From this perspective, the frequent transmission of strong radio signals to the earth means that they are either "casting a wide net" without a specific destination in order to find planets with life and civilization. As long as they receive You can immediately lock the coordinates when you receive a reply (as for what you want to do, you can brainstorm as much as you want); or you can send it in a targeted manner, but you are not sure whether there is civilization here, so you will test it first.

No matter which one it is, for humans, the distance of 1.3 billion light years is already very far away. If there is no special processing, then the information we receive is likely to be left over from 1.3 billion years ago. electromagnetic waves.

If you want to reply, it will take the same amount of time to transmit back, which is almost meaningless.

Regarding aliens, we can imagine a "stumbled two-way rush," but we must also be vigilant. Perhaps in the future, the instructions for going out will gradually change from "girls (boys) are also outside." "Protect yourself" became "People on earth should protect themselves outside."

Why do we say "pulsar"? Because this is a very common planet in the universe that can release electromagnetic pulse signals, a Gaussian rotating planet, and can produce periodic radio waves.

According to the objective existence and distribution laws of the cosmic microwave background radiation, astronomers have found that the frequency of energy release of pulsars in the universe is consistent, so pulsars are easily regarded as "alien" by humans.

The energy released by pulsars is generally radio pulses, and the intensity and frequency of the release are the standards that can be achieved by the collision of stars with small size but very large density and mass. Therefore, in addition to black holes, this Neutron stars, the densest stars outside, "illuminate" reality from theory.

Because of the high-speed rotation of pulsars, they have strong, stable, and short pulse periods. We can understand it this way, just like the earth's rotation changes between day and night, changing every 24 hours, and every time a pulsar rotates, a radio electromagnetic wave is released, and the continuous rotation forms a periodic The pulse-like signal propagates and is captured by the earth, becoming electromagnetic waves with frequency.

Therefore, if there is an operating pulsar in space 1.3 billion light-years away, it is not surprising that we can receive repeated radio signals.