They just ain't there!

Believe it or not, some astrologers consult up to a hundred 'hypothetical planets' in the belief that they have the same effect on an astrological chart as the actual planets. These non-existent planets have usually been 'discovered' by mediums, and in some cases ephemerides have been prepared for them, showing their movements through the skies - or, presumably, where the movements they would have made if they actually existed. The theory by which they can possibly mean anything is obscure. But take it from us, Isis, Janus, Lilith, Hercules, Hermes and the rest simply don't exist except in the minds of astrologers who are right at the edge of loonydom.