[ExI] Our radar means ET knows we're here

[BillK]

Like it or not, radar means ET knows we're here
By David Szondy       July 08, 2025

<https://newatlas.com/space/radar-means-et-knows-were-here/>
Quote:
It turns out that when it comes to high-powered directional radar
signals, the Earth is screaming like a banshee and has been since the
early years of the Cold War in the 1950s. According to the study, the
combined civilian radar signals from our planet add up to a whopping
2x1016 watts, with military systems adding in a more focused and
directional signal of 1x1014 watts. And it generates a radio signature
that screams artificial technology.

This leakage from the Earth's air traffic and defense systems means
that we are extremely visible to anyone within 200 light years of us
that has a radio telescope equivalent to the Green Bank Telescope in
West Virginia. If we take into account earlier studies that included
larger, more powerful telescopes like the defunct Arecibo Observatory
that limit extends to over 60,000 light years.
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OK, so maybe ET knows we're here. But we haven't detected similar
radar signals coming from nearby stars.
That means ET is not at the same stage of development as us and
doesn't use similar radar systems. ET, like us, is still faced with
the problem of the huge distances between star systems. When a star is
200 light years away, just saying "Hi" and getting a reply takes 400
years. Actually visiting would take far, far longer.
How to deal with the huge distances between star systems is a problem
for all ETs.

BillK