Hey Mensa517, I forgot to mention in my P.M. to you that I think that maybe Mr. Sagan was thinking in terms of averages, in this case the decimal system, for the purposes of making rough estimates. He would not have thought of supposing other planetary system to have an average of eight, nine or twelve but Ten, yes and I suppose he was thinking that "our" Solar System falls within that average estimate. I would not venture to suspect anything along "conspiracy" lines.
