Shulou(Shulou.com)11/24 Report--

CTOnews.com, May 8 (Xinhua): humans have been eager to get in touch with alien civilizations, but so far, we have not received any signals from the depths of the universe. Does this mean that we are alone in the Milky way? A Swiss scientist thinks it may just be because we don't have enough patience and luck.

The scientist is Claudio Grimaldi (Claudio Grimaldi), a biophysicist at the Statistical Biophysics Laboratory at the Federal Institute of Technology (EPFL) in Lobsang, Switzerland. He recently published a paper in the Journal of Astronomy proposing a new hypothesis to explain why we have not yet detected extraterrestrial radio waves.

His hypothesis is this: suppose that at least one higher civilization in the Milky way sends out electromagnetic signals, and the earth happens to be in a radio blank area, like a hole in a sponge. In this way, even if aliens exist, we will not be able to receive their signals.

Grimaldi supports his hypothesis with a statistical model that was originally used to study porous materials, but he transformed it into a tool to assess the distribution of extraterrestrial signal transmitters in the Milky way.

His model shows that if the earth is really in a blank area of radio waves, there will be only one to five electromagnetic events in the Milky way per century. This is lower than the frequency of supernova explosions in the Milky way.

In an assessment like this that involves probability, there are usually assumptions that can be considered. You can adjust the factors to be more optimistic (or pessimistic) and adjust the likelihood of catching signals in the future. According to the most optimistic scenario, under these conditions, Grimaldi said, it may take us at least 60 years to detect alien signals. In the worst case, we may have to wait for more than 2000 years. In both cases, we need to point the radio telescope in the right direction.

In other words, the probability of aliens sending a signal is very small, and the probability that we can receive the signal is even smaller. Even if a signal passes through the region of the earth, we need to have radio telescopes that are strong and accurate enough to point in the right direction.

Grimaldi believes that just because we haven't received a signal from aliens yet doesn't mean they don't exist or don't want to communicate with us. On the contrary, it may be just because we have just begun to explore the universe with radio telescopes and happen to travel through an area of space where radio waves are scarce.

"to me, this assumption is much more reasonable than the assumption that we are surrounded by all kinds of signals but cannot detect them," he said. "

Grimaldi suggests that the search for extraterrestrial intelligence (SETI) is best conducted in the form of symbiotic surveys (commensal investigations). In other words, look for technical signals while analyzing other astrophysical data, rather than using radio telescopes to search for aliens.

According to CTOnews.com, Grimaldi's research is designed to remind us that finding extraterrestrial intelligence is a long and difficult process that requires more patience and innovation.

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