Historical clue formulations

• Either of two extremes in an orbit — 2018-07-14
• Extreme point in an orbit — 2012-01-10
• Orbital point — 2009-05-17
• Orbital point — 2008-09-28
• Orbital point — 2005-03-09
• Orbital point — 1998-12-13
• Orbital point — 1997-07-22
• Orbital point — 1997-07-20
• Orbital extreme — 1996-12-15
• Architectural recess — 1996-08-13
• Architectural projection — 1994-11-23
• Extreme point in an orbit — 1994-09-26
• Higher_____ (orbital point) — 1994-06-17
• Point in orbit — 1994-01-30