“One would think that anyone trying to make a deal out of these constellations would notice when the sun, moon, etc. are “in” them and go according to that.”
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Another thing: since the stars that make up the constellations are light years away your daily horoscope may be right, but it’s off by at least a few thousand years!
:D
LOL, that's a great observation!
Given the movement of stars within our galaxy and the size of the galaxy (about 100,000 light years across), it would be pointing at something completely different.
Today, it would be possible to compute it -- we should have enough information on at least the stars in the various constellations.