Astronomically speaking, the ninth house is that one-12th sector of the local sky clockwise from the Midheaven (see above picture) occupied by planets two hours after they culminate. Astrologically, the ninth house is where we search for truth: experiences that broaden the mind and help us form our philosophy of life. Here we expand our consciousness, synthesize meaning from facts and experience, adjust personal attitudes to collective ideas, and understand how things are integrated into systems. This house rules higher education, religious and ethical understanding, spiritual visions, in-laws, long journeys, law and the higher courts. Here is what remains of the purification that took place in the eighth house: its seed or essence. "Religion" comes from the Latin "re-," back + "ligare," to bind, hence, "to bind back," and thus refers to all things that last or endure, such as the truth. Many planets in the ninth are usually an indication of being unwilling to accept the conventional limits within which we were raised.

This Ninth House of Astrology Houses page and much of this 550-page resource website are taken from You and the Universe.