The 81-year-old Aldrin was married for 23 years to Lois Driggs Cannon.
He filed a divorce petition at a Los Angeles court. In the petition he cited “irreconcilable differences” as the reason.
The couple married in 1988 but have no children together. Aldrin’s first marriage was to Joan Archer, with whom he had three children. His second marriage was to Beverly Zile.
Aldrin was the second man to set foot on the moon after he and Neil Armstrong landed there July 20, 1969 in Apollo 11.
He has denied any jealousy about being the second man on the moon. “I’m not jealous of anybody else, why should I be?”
Aldrin retired from the space programme in 1973 and rejoined the air force in a managerial role.
He also wrote an autobiography “Magnificent Desolation and Return To Earth” where he spoke about suffering from clinical depression and battling alcoholism after leaving NASA. (IANS)