and another fun thing to think about… if we ever do receive like a radio transmission from one of them… by the time we receive it … whom ever sent it, IS dead, and with the possibility that the rest of the community, or all life on the planet could be comepletely dead too.
so the odds of us meeting any other life form = 0%
and if you think about that in terms of intelligent beings…
say (for sake of easier numbers) humans have been around for 20,000 years (rough estimate) our planet is 4.5billion years old.
20000/4.5billion years = 4.4 x 10 ^6
so those 100billion other stars multiplied my the percentage in time of intelligent life forms … leaves us at about 44000ish chances that we could meet another intelligent lifeforms.
if you are more of a realist like me… I’m thinking us humans have about 1000 years on this planet before we completely destroy it, and we all die. so that takes the the number of intelligent lifeforms down to… 2200 stars…
then saying their solar system is just like ours… 1 out of 9 planets can maybe have life on them, and the chances of them havening a planet like ours positioned perfectly away from the star, with an atmosphere (i don’t know the odds) i’ll just say 1 in 100 (when its probably more like 1 in 1 million)
but anyway… through odds that takes us down to 22 stars with possible chances for life…
ANOTHER SIDE TANGENT.
If we do meet us with some other lifeform… would you want to meet them… they WILL be about 1000 years ahead of us in terms of technology and evolution, which may have turned them into a peaceful community (hopefully) or imperialists (which we’d stand noooo chance)