For the most part of Earth's history, unimaginable expanses of the universe were seen in the night sky. But with the increase in population and the corresponding growth of lighting has led to light pollution. Light pollution is blamed for energy loss, disrupts wildlife behavior and even damages mental health. But one scientist has now pointed out a neglected aspect of this light pollution: humanity can inadvertently transmit our presence to intelligent alien civilizations.
Radio signals have long been considered capable of reaching civilizations capable of detecting radio waves, but light pollution emitted from Earth also leaks into space.
The question is how widespread extraterrestrial life is and how to look for it.
This light pollution is increasing at about the same rate as the population increase, by about one percent.
Dr. Jaco Van Lun of Kiel University told Express.co.uk how this could be made public in our presence and used to search for extraterrestrial life.
He said: "We are looking for ways to find biosignatures ̵
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Alien search for life: Earth-emitted light pollution, same o Runs Into Space
"If these aliens are technologically advanced, they will leave artificial signatures.
" You can think the opposite, and we could use this principle to search for an extraterrestrial life. "
The luminous output of Earth 100 years ago was probably one-third of the present.
In those 100 years, light would have passed 100 light-years, and you can count how many stars there are in that volume within a radius of 100 light-years, explained Dr. Wang Moon.
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He said, "In this small volume, we are unlikely to find a civilization as advanced as ours .
"We are still struggling to directly find life on planets around other stars – we still cannot do this for Earth-like planets in Earth orbit.
"But in the next few decades it is very likely that we will be able to begin to do so.
"To the extent possible, reasonably advanced alien civilizations can do this.
"But they must be close enough, because if they are 1000 light-years away, they will see the earth as it was 1000 years ago, and the Earth was not illuminated by artificial light sources in the Middle Ages. "
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it is estimated that 10,000 stars exist within a radius of 100 light years away.
But despite the large number, there may still be less than one technologically advanced civilization.
Dr. Wang Lun said, "I would not
"That may seem a little pessimistic, but we're looking for less than a century.
" But if you emit radiation, it just goes on – there's no way you can bring it back.  READ MORE: NASA Scientists on the Edge of Opening a Time Travel?
"And at some point it will cover a volume that may include technologically advanced civilizations."  The scientist agrees that we should heed the advice of Professor Stephen Hawking and avoid broadcasting our presence on ozhno most.
He said, "It may be reasonable as long as it is not considered safe.
"It really depends on what kind
" And when you think about it, we just think about the consequences as a whole.
search for life of aliens: light pollution can simultaneously advertise our presence and be used to search for extraterrestrials
"Therefore, it may be reasonable to try to limit the leakage of any signals, since there is no benefit to this and it exists risk associated with
Dr. Wang Lun admits that he cannot be sure that the intelligent outsider life exists to me, but he believes that it probably exists, "because it is harder to understand why he would not do it." 19659006] "We may be the only ones in the Milky Way, but there can be many and many reasons why we have not noticed them yet.
" But based on our own existence and how we know life is developed on Earth, it is very likely to have ha ppened elsewhere. “