Greatful

[jivatman]

@ ankh

It's called the Saturn cycle and it is by far the most well known of astrological cycles. Saturn aspects are generally seen as painful.

At the age of 7, Saturn first forms a hard aspect to the Saturn in the natal chart, a square.

At 14 it forms an opposition,

At age 21 it forms square again,

Age 30 is perhaps best known, it is called the "Saturn Return" because it forms returns and forms a conjunction with the birth chart Saturn.

(Conjunction, Opposition, Square are the major "hard" aspects)

Conjunctions are the most powerful aspect because it is the simplest relationship, 1 followed by opposition, 2.
However, Squares are generally seen as the most difficult, followed by opposition.

Saturn returns have actually crept somewhat into popular culture:
The hit song "The Grudge" by tool is about it
REM has a song called "Saturn Return"
Also references by Goldie, No Doubt, ect.

Look on the Wikipedia page of "Saturn Return" for more.