Public opinion was stirred by the news that China received strange signals from aliens, while some US officials said: “Aliens may have come to Earth”.

Scientists believe that, in the vast Milky Way Galaxy, there is life like our planet. Throughout history, many times countries around the world have revealed research information that is believed to be related to aliens.

Radio signals from space
Chinese scientists recently announced that their giant “Sky Eye” telescope may have picked up traces from an alien alien civilization. pure. Accordingly, the signals were received by China’s 500-meter Aperture Spherical Radio Telescope, nicknamed “Sky Eye”, which is the largest radio telescope in the world.

Since the signals are narrow-band radio waves typically used only by human aircraft and satellites, scientists believe they could be generated by alien technology. 

However, experts say their findings are preliminary and should be done with caution until the analysis is complete.

Zhang Tongjie, a scientist who heads the Extraterrestrial Civilizations Research Group at Beijing Normal University, told Science and Technology Daily: “These are some of the narrowband electromagnetic signals that are different from what was previously detected. received and the research team is currently conducting further investigation”.

 “The possibility that the suspicious signal is some kind of radio interference is also very high and it needs to be further confirmed and ruled out. This could be a long process,” he added. 

In the latest report sent to Science and Technology daily, Zhang Tongjie said that the suspicious signal may not come from aliens, but simply due to radio interference.

It is possible that Science and Technology Daily hastily published news and concluded about signs of extraterrestrial civilizations after receiving strange signals that have not been verified by a third party. 

This is not the first time scientists have picked up narrow radio signals from deep space. 

In August 1977, a “Search for Extraterrestrial Intelligence” (SETI) conducted by the Big Ear telescope of Ohio State University obtained an intense, one-minute electromagnetic explosion. , flared up at a frequency that scientists suspect could be used by alien civilizations.

When the signal was detected on a data printout, scientist Jerry Ehman worked and made additional observations from the Big Ear telescope that night to uncover additional data to serve in the analysis.

 However, subsequent searches in this region of space returned empty-handed, and subsequent research suggested that the signal might have come from a Sun-like star located in the constellation Sagittarius. So far, the source of the signal remains a mystery.

In 2019, astronomers detected a signal being transmitted to Earth from Proxima Centauri – the closest star system to our Sun (about 4.2 light-years from Earth). According to science, this is where at least one potentially habitable planet is located. 

The signal is a narrowband radio wave that is often associated with man-made objects, leading experts to make interesting speculations that it comes from alien technology. 

New studies published two years later suggest that the signal was most likely generated by human technology due to a technical glitch.

Besides, another famous set of signals once thought to come from aliens, discovered between 2011 and 2014. The real cause was created by scientists cooking lunch in the microwave. wave.

Tonjie added that his team is planning to make repeated observations of the strange signals to completely eliminate any radio interference and get as much information about them as possible.

“We want the FAST telescope to be the first to detect and confirm the existence of extraterrestrial civilizations,” Tongjie told Science and Technology Daily.

The difference between the size and age of the universe and the apparent lack of intelligent life forms beyond Earth, known as the Fermi Paradox, has long baffled scientists studying the universe. pillar. 

This paradox takes its name from the ordinary lunchtime reflections of Nobel Prize-winning physicist Enrico Fermi, who, after pondering the conundrum, is said to have remarked “so where is everyone? “

“It is possible that aliens have fallen to Earth”
On May 17, the US Congress held a hearing on government information related to “aerial phenomena”. define” (UAP).

Discussions at recent hearings revolved around potential threats from UAPs, as the US government suspects they are man-made high-tech devices that threaten US airspace. , but some congressmen and people in the US military suspect that it is from aliens.

As Republican Congressman Tim Burchett stated before the hearing: “It is possible that aliens have fallen to Earth and the US Government is just covering it up.”

For more than a decade, scientists have used radio telescopes to conduct a variety of experiments in search of technological structures – considered signs to detect other civilizations in the galaxy. Galaxy.

Although scientists believe that life will almost certainly exist among the trillions of planets in the universe. Its huge volume makes interstellar travel, receiving signals or communicating with any potential life form at great distances extremely difficult according to known laws of physics.

The signal would take about 4 years to travel between Earth and the nearest star in the galaxy.

The reason given is that the speed limit at the speed of light is about 300,000 km/s. But even at that rate, the signal would take about 4 years to travel between Earth and the nearest star in the galaxy.

Einstein’s special theory of relativity tells us that, in reality, the speed of a physical object like a spaceship would be slower than the speed of light.

So for planets hundreds or thousands of light-years away, travel times can be up to thousands of years. And any signals originating from civilizations on those planets are extremely weak and difficult to detect.

A question posed by scientists is whether we think an alien spacecraft can travel thousands of years, across interstellar distances, more powerful and designed better than our plane?

Thanks to the radars that continuously scan space, billions of cell phone cameras, and hundreds of thousands of amateur astronomers photographing the sky (as well as professional astronomers with powerful telescopes), there is a need for a lot of good evidence of aliens in the hands of the public and scientists, not just governments.

The Green Book Project Says Flying Saucers May Have Sighted
The first human sighting of a UFO occurred in 1947, when businessman Kenneth Arnold claimed he saw a group of nine high-speed objects near Mount Rainier. in Washington, as he was flying his small plane in the sky.

Arnold estimates the speed of the crescent-shaped objects to be several thousand miles per hour and says that they move “like discs sliding across water”.

In 1948 the US Air Force began an investigation into these reports known as Project Blue Book. The initial opinion of project participants was that the Unidentified Flying Object (UFO) was most likely a high-tech aircraft from the former Soviet Union.

The first human sighting of a UFO happened in 1947

But some researchers think they could be spacecraft from other worlds, known as the extraterrestrial hypothesis (ETH). 

From 1952 to 1969, the Project Blue Book project compiled reports of more than 12,000 strange sightings classified into two categories.

Class 1 is defined to include astronomical, atmospheric or man-made phenomena and category 2 includes cases where there is not enough information to define a known phenomenon. 

Strange Phenomenon Happening Near US National Airport
In the summer of 1952, a series of radars and strange sightings occurred near National Airport in Washington, DC. Accordingly, the radar detected many strange objects on the screen. Although these events are attributed to the temperature difference in the air in the city.

Meanwhile, the number of UFO reports has risen to a record high. This prompted the Central Intelligence Agency to force the US government to form an expert panel of scientists to investigate the phenomena. 

The panel was led by physicist HPRobertson at the California Institute of Technology in Pasadena, California, USA, and many other physicists, an astronomer and a rocket engineer. 

The Robertson Council met for three days in 1953 and interviewed military officers and the head of Project Blue Book, and reviewed UFO films and photographs. 

It concluded that 90% of sightings of strange phenomena are attributed to astronomical and meteorological phenomena such as planets, bright stars, meteorites, auroras and ion clouds or objects above. land like airplanes, balloons, birds flying. 

Besides, there are no obvious security threats and no evidence to support the ETH hypothesis. Portions of the panel report were kept secret until 1979, and this long period of secrecy raised suspicions of a government cover-up.

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