Chet Raymo mentions an astronomical fact: the sun spends more time in the constellation Ophiuchus than it does in Scorpio. My sun sign isn’t Sagittarius, but the healer/snakehandler. Topping that off, because of the wobble in earth’s orbit, the sun signs are now about a month off from the actual astronomical reality. You were born on this date? You’re not a Capricorn, but a Sagittarius.
Pluto, if you consider it a planet, was in the constellation of Serpens until a few years ago. Now it’s in Ophiuchus. What does that do to your seventh house?