Civil and earthly radar radar emitting signals captable in space: a possible technopherm detectable by alien civilizations up to 200 light years.
Without wanting it, we could already have revealed our presence to any extraterrestrial civilizations. This is what emerges from a new preliminary study presented to National Astronomy Meeting 2025 from the Royal Astronomical Societyaccording to which i civil and military radar on earth emit powerful enough signals to be detected by any alien civilization until 200 light years away.
Our airports speak to space
The researchers of theUniversity of Manchester they simulated how these signals appear to a hypothetical alien observer with RadioTelescopi similar to Green Bank Telescope. The result? Stops like Heathrow, Gatwick and the New York JFK emit radar signals that reach a combined power of approx 2×10⁵ Watt – A radio wave that could easily overcome ours Solar system and get to close stars such as the Star of Barnard And Au microscopii.
Military radars “scream” in the universe are also
THE military radarmore directional, generate signals similar to a rotating lighthouse in the sky, with peaks up to 1×10 June Watt. “A distant observer could recognize these emissions like clearly artificial “explains Ramiro Caisse Saidedoctoral and first author of the study. In certain directions, he adds, these signals may appear One hundred times stronger.
An all -terrestrial technopirma
These signals represent a potential technopirma: a technological indication that suggests the presence of smart life. Exactly the type of trace that scientists are looking for in the cosmos to find others advanced civilizations.
Useful information to improve the impact of human activities
According to the co -author, Michael Garrettunderstanding how our signals spread to space also helps “protect the radio spectrum ” (i.e. to avoid interference between different transmission systems), improve the Future radar systems and evaluate the impact of human activities on the space environment.
