Astrology, or believing that the stars and planets have
an influence on peoples lives and events.
excerpt taken from Book" Prohibitions that are taken too
lightly"- English Translation
by Sheikh Muhammed Salih Al-Munajjid
Zayd ibn Khaalid al-Juhani reported: The Messenger of Allaah
(peace and blessings of Allaah be upon him) led us in the
morning prayer at al-Hudaybiyah after rain had fallen during
the night. When he had finished, he turned around to face the
people and said: Do you know what your Lord says? They said,
Allaah and His Messenger know best. He said: [Allaah says]:
This morning one of My slaves became a believer in Me and one
became a disbeliever. As for the one who said, We have been
given rain by the grace and mercy of Allaah, he is a believer
in Me and a disbeliever in the stars; as for the one who
said, We have been given rain by such-and-such a star, he is
a disbeliever in Me and a believer in the stars. (Reported by
al-Bukhaari; see Fath al-Baari, 2/333)
Similarly, the one who reads the horoscopes in newspapers and
magazines and believes what they say about the influence of
the stars and planets is a mushrik, and the one who reads
them for entertainment is a sinner, because it is not
permitted to entertain oneself by reading things that contain
shirk, because Shaytaan will try to lead him to shirk through
this.