EDIT: He...PureGhost, read my post two posts above, you are exposing exactly my point...
Reply for Becky
But as for astrologists, the discovery of "planets" of the same (or bigger) size than Pluto, and the same characteristics, should be a "We were wrong".
Because consequently, if they consider Pluto a planet, they should make the astral charts with 12, not 9.
Anyway, as you said, re-evaluation is for sciences, and Astrology is not a science, but folklore for dumbs.