Have you ever believed that your fate has something to do with the conjunction or opposition of the stars? You are not alone. Since time immemorial, astrology has been a preoccupation of the human race.
This week Carl Sagan 's journey takes us to ancient sites which bear vivid witness to early man's obsession with the stars - and the dawn of scientific observation.
From there we go to the turbulent 16th-century world of Hand Kepler, a tortured genius whose integrity and perseverance made him the last scientific astrologer and the first astrophysicist.
A joint production of KCET and Carl Sagan Productions Inc in association with BBCtv.
(Profile of Carl Sagan, R4, Friday, 5.10)