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We have beamed messages to extraterrestrial
mostly to far-off locations: 13, 15, 16, 21, 21, 30, 33,
37, 41, 41, 41, 41, 46, 52, 56, 56, 58, 58, 58, 68, 69,
70, 250, 431, 25000 light years away. Only 6 locations
out of total 25 were nearer than 30 light years. (see
we seem to have never sent any messages to
our closest stellar sun-like companions (4.3, 4.3, 10, 12,
16, 19, 20, 24, 26, 29 light years away), which were
chosen as primary targets for the cancelled "Terrestrial
Planet Finder" program. There are at least 4 promising
places nearer than 12 light years away. (see link2)
The idea is simply, to use METI methodology to probe for
life in these close sun-like stars, which were primary
targets for TPF. We won't find microbial life, but the
possibility of finding intelligent life cannot be ruled out,
except for the youngest stars in the list.
Nearer distances mean less scattering of our signal, and
higher likelihood of being able to communicate.
And, we just might have some results as soon as in 8.6
(link1) Current transmissions on route
[Inyuki, Dec 27 2011]
(link2) Terrestrial Planet Finder targets
[Inyuki, Dec 27 2011]
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||If you want "nearer distances," why not beam messages to extraterrestrial civilizations presently visiting the Earth? Judging by the variety of spacecraft, there must be a dozen of them.
||How do you know the ones already visiting us are from nearer planets? IIRC the "most likely" distance to find intelligent life is 2000 light years.
||It doesn't matter where they're from originally, Matt. If they are mucking about in the Solar System, they are close enough.
||i wonder if the stonehenge people were using the
bluestone to do spectroscopy - using the positioning
of the sun, moon, stars, horizon and stones to bend
the light in some way so that they could perceive the
spectroscopic disturbances as a real-time "movie" of
remote inter-stellar activity?