Do humans ever feel lonely? For most people, no, but for scientists looking for the truth, humans are alone. They observe space day and night and continuously send human messages into space, hoping to detect a signal or get a response, hoping to capture information from other people who may be living in space. They are excited but also scared.
Hawking has warned that humans should not easily reveal their information to deep space, because we do not know the alien civilization. If we really get a response, then the possibility of human threat is more than the possibility of peace. But human curiosity breaks this warning, humans hope in the short human life to discover unknown secrets. Perhaps this is the true meaning of life. But so far, all they've received is a series of unidentifiable noises.
On April 29, 2019, just a year after Hawking's death, the Parkes Radio Telescope in Australia recorded an unusual radio signal from our solar system's closest neighbor, the Centauri star. To this day, scientists still can't solve the mystery! So could it be a message from an alien civilization? 39bet-xsmb-xổ số tây ninh-xổ số binh phước-xổ số binh dương-xổ số đồng nai
The Parkes Radio Telescope in Australia is known to have recorded the BLC 1 signal in the Centauri neighborhood. Centauri's nearest neighbor isn't just the closest star to our solar system; it is also surrounded by two exoplanets, one of which scientists once suspected might be habitable. This planet is one of Centauri's nearest exoplanets, in the habitable zone. When an exoplanet is in the habitable zone, it suggests it can support life. With this in mind, it is clear that we need a technologically advanced civilization to receive radio transmissions from space. So what happens after the Parkes radio telescope gets the BLC1 signal?
When recording signals from outer space, radio signals from Earth and other interference will be removed from the final recording. The researchers then studied the recordings. The BLC 1 signal has been archived for nearly a year and was not studied again until October 2020. The BLC 1 signal has only intermittent noises like that in its sound, not the kind of alien communication we'd expect. So what is it about the other captured signals that really sets it apart?
From 26 hours of data, the researchers were able to isolate five repeated signals at a frequency of 980.2 billionths of a megahertz. Of course, even with this signal, it still doesn't encrypt complete information, such as coordinates or information about alien species. Space may seem completely silent and lifeless to everyone, yet radio telescopes record a lot of noise from quasars, pulsars, interstellar gas, and Earth disturbances. Amid all this noise, however, what astronomers need are so-called narrowband signals.
Astronomers are now looking for these signals because only technical objects can produce narrow-band emissions. At various points in orbit, radio telescopes record tens of hours of data. The input is then processed by the system to remove any superfluous and non-narrowband signals. And, in most cases, nothing is left after the filtering process. However, the signals from Centauri's immediate neighbors are different, and automatic filters can't cancel the noise. In addition, the signal moves over time, just as it would from an orbiting object.
Scientists must re-record the signal to have enough evidence that it is useful. However, Centauri's immediate neighbors did not send out the same signal. But all is not lost, because with the exception of BLC1, the researchers recorded signals multiple times over several days instead of just once. For example, the FRB radio burst or fast radio burst signal obtained by astronomers in 2012. As they studied its source for five years, they realized that the radio burst had its own timeline, lasting about 90 Earth days, then disappearing from radar for 67 days before reappearing. The signal could be a broadcast from an alien culture, seeking to communicate or waiting for a response. In other hypotheses, signals could be messages sent into space just to let the world know of their presence.
However, even if about 700 FRB signals are detected, scientists do not know what produces them. They can only assume it could have come from a magnetar, because magnetars are neutron stars with strong magnetic fields. The question is: could this be the signal from extraterrestrial intelligence we've been waiting for? We are frustrated because we are not receiving space transmissions or space messages that we want, but the fact is that we are also transmitting into space messages that are unclear and strange to them, so is it possible for aliens to decode our messages?
1974 The Arecibo Observatory in Puerto Rico launched the first radio communication from Earth into space. The message was encoded in binary code and the scientists broadcast it as a radio transmission. It contains information that aliens need in order to be aware of our presence, and the information is math. Mathematics is thought to be the only comprehensible language in space, so the message would be different from natural space signals, meaning an extraterrestrial civilization would be able to detect the message anyway.
In addition to the Arecibo message, scientists sent several other signals from Earth via Pioneer 10 and Pioneer 11. These are the spacecraft that flew in 1972 and 1973 to investigate Jupiter and Saturn, hoping to inform aliens of our presence. Each spacecraft is adorned with plaques depicting the distance from our solar system to the 14 pulsars and galactic cores. The most famous message humans have delivered to space is the so-called Voyager Gold Record, which contains greetings in 55 languages, musical compositions, natural noises and images of humans from around the world. It also includes an hour-long recording of Ann Druyan's brain waves, reflections on world history, and a speech by Jimmy Carter, the 39th president of the United States.
We don't know if the aliens really understand it, and we don't know if NASA's instructions on how to play the recording are helpful to them. In fact, they may not understand human images any more than we understand rapid bursts of radio waves. Besides, we don't know how alien civilizations would react if they received our message. So let's say the aliens get Voyager 1, and they're smart enough to know how to listen to the Golden Record. Jimmy Carter's speech will help them learn how human language works, and they may even record the messages sent to us in our language. They might even follow the instructions on the recording package and track the location of the solar system before sending us a radio signal. What do humans do in this situation?