alt Hacker NewsThis assumes that ETs are deliberately transmitting high power signals towards us (or into space in general), although I'm not sure that is a reasonable assumption. I think it would generally be unwise to loudly announce a civilization's presence.
According to chatgpt, our current earth-based radio telescopes would only be able to detect signals equivalent to radio leakage from earth at a distance of 1 light year.
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But what did you think?
It's mostly not reasonable to try and ascribe human motivations to alien entities, particularly when we know some humans would definitely fire up the transmitter if they could.
The presence or current lack of alien signals at the very least bounds estimates of local population density and what energy scale they're operating on. Currently there's no nearby Type 1 Kardashev scale civilizations.
I heard this as well by scientists from JAXA. They gave a presentation on SETI.
When it came time for questions I asked. So, if we were at Alpha Centari could we detect signals from earth with the tech we currently have? They said "No". That was 2019. Maybe tech is better today?