this post was submitted on 18 Apr 2026
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It is amazing they can detect and communicate to something with such a weak signal so far away.
I was actually looking into this a little bit recently and it turns out the Voyager spacecraft launched with 23 watt radio transmitters but at the distance it takes a 72 meter dish to capture the signal and at its capture it is one attowatt. I don't remember my system right offhand, but it's something like a billionth of a billionth of a watt. It's stupidly small.
So far away that it takes an entire day to get the signal to it. The earth to the sun is 8 minutes.
And somehow we can still talk to it. It's amazing.
About 1/3 of a % of a lightyear that's hardcore that we've gotten something out that far.
It also gives you an idea of how big space is. Lots and lots of nothing.
This, coupled with the improbable idea that it could be "found" someday, has got to be one of the most exciting and magical concepts in science ever
1-2 day ETA for an interstellar telegram lol