A hypothetical alien civilization would be able to detect earth radio transmissions within a 100 light-year radius. Years from the Sun. Astrophysicist Alexey Rudnitsky, deputy head of the Astrospace Center of the Lebedev Institute of Physics, told socialbites.ca.
Astronomers have been trying to detect aliens for decades by collecting their radio signals. These studies began because the earthly civilization, due to the work of television towers, left a visible trace in space and could be easily detected.
“It is estimated that an extraterrestrial civilization with human-level development can receive our television signals within a 100-light radius. years. There are tens of thousands of stars in this region, and the existence of alien intelligent life on one of their planets is quite possible. “They definitely won’t be able to receive a TV image due to the weakness of the signal, but they can receive the audio component, yes,” said the scientist.
At the same time, receiving a sound signal does not mean that aliens will reproduce this sound. They will need to understand that the received radio waves should transmit sound and also connect the receiver to a speaker similar to the one on Earth.
However, even if it is not possible to listen to an earthly television broadcast, a civilization with almost the same level of development as humanity will be able to understand that the signal is artificial.
About how aliens can learn about the existence of human civilization thanks to radars – material “socialbites.ca.