unknown "Window of Opportunity" where Jack is golfing through the stargate. Altair P3X-989 Harlan's homeworld. Seen in " Tin Man " and mentioned in " Double Jeopardy ". Alpha Site 1st: P3X-984, 3rd: P4X-650 1st: 3rd: A designation for a previously uninhabited world (now a military base) set up in case Earth