|This is the talk page for discussing improvements to the Active SETI article.|
|WikiProject Astronomy||(Rated Start-class, Low-importance)|
Zaitsev makes a good point imo. If no one messages the others, they won't message back. It's called the Bystander effect or pluralistic ignorance, on a galactic scale maybe.184.108.40.206 (talk) 10:42, 7 January 2009 (UTC)
A note on an idea of using an array of sun shields to encode the message
I think probably the most promising way to inform others about us is to design a specific Sun shield to modulate the light emitted by the Sun, because it is highly likely that we could manufacture (more thoughts on that at Space mirror (anti-global warming measure)), and it would be discoverable by civilisations capable of creating tools analogous to the Kepler mission's tools. The shield could be an array of planet-sized shields in an orbit in align with the galactic plane in a reasonably close orbit around the Sun, arranged in such distances as to create light intensity variations with varying intervals, identifiable as a message, and not misinterpreted as natural phenomenon.
For example, putting only TWO planet-sized shields arranged in orbit could produce the following sequence of TIME INTERVALS:
where the longer interval is nearly precisely two times longer than the shorter interval (i.e., the ratio not 1:2.1, but quite precisely 1:2.000000000), indicating that it is highly unlikely that this ratio 1:2 had occured naturally, and their confidence about an intelligent civisation could be increased arbitrarily with increasing the precision of the time interval measurement. If that doesn't give enough confidence, then THREE shields with precisely the 1,2,3,1,2,3,1,2,3.... perhaps would do.
By placing a few more of these space shields, you could even write even a highly unlikely approximation of a mathematical constant:
Should it be considered Perceived Risk or Potential Risk?
Perceived risk implies that emotions are dominating over fact, versus potential risk which suggests that there may be real reasons to question the motives. DefaultChris (talk) 08:08, 13 June 2010 (UTC)DefaultChris
Error correction is much lower that quoted. For exemple, Arecibo is zero, since changing one bit change the meaning. Cosmic Call is better. I dont have the number in front of me but It was certainly not 46%, 15% would be more more realistic. —Preceding unsigned comment added by Yvan Dutil (talk • contribs) 12:45, 17 June 2010 (UTC)