The telling of fortunes through the movement of planets (9)
I believe the answer is:
astrology
'the telling of fortunes through the movement of planets' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for astrology that I've seen before include "Study of alleged influence of stars on human affairs" , "Study of the influence of stars on character" , "Fortune-telling from the stars" , "Star divination" , "The telling of fortunes through the movement of planets" .)