Well here's something interesting. It is my understanding that once content has been declared to be Open Gaming Content, it remains so afterwards.
One other Traveller game has released material that is OGC - Traveller d20.
In the back of the T20 book (page 442) it says:
Except as specified as Product Identity (see below and section 1e of the OGL) or Trademarks (see below and section 11 of the OGL) the following material is considered Open Game Content under section 1d of the OGL:
All of Chapters 2: Characters, Chapter 3: Classes, Chapter 4: Skills, Chapter 5: Feats, Chapter 6: Final Details, Chapter 7: Prior History, Chapter 8: Combat, Chapter 9: Prestige Classes, Chapter 10: Psionics, Chapter 15: Starship Encounters, and Appendix III: Friends and Enemies.
From Chapter 11: Technology and Equipment - all weapons, armor, equipment stats, and descriptions.
From Chapter 12: Design Sequences - All final design specifications. You may use any computer, vehicle, or starship final design as OGC, but you cannot explain or detail how it was actually created.
From Chapter 13: Standard Designs - Everything but the Design Specifications for each listed entry.
From Chapter 15: Universe/World Development - All final world specifications. You may use any final generated world statistics OGC, but you cannot explain or detail how it was actually created. The animal development rules and f inal stats are also considered OGC.
From Chapter 16: Traveller Adventures - Rewards and Advancement and the Epic Adventure System.
It then goes on to specify that "those sections that are solely derived from the original Traveller canon works, such as vehicle and starship design, or the worldbuilding rules remain closed content and are not considered Open Game Content".
Then it lists a massive wall of text containing all the "Product Identity" which is in addition to items specified under 1e of the Open Game License. This includes all the terms specific to Traveller - a random selection of these are: Ziru Sirka, Rule of Man, Zhodani Consulate, Hiver, K'Kree, Inyx, Sydite, Humaniti, Solomani, Zhodani, Vilani, Regina, Glisten, Lords of Thunder, Deadspace, Amber Zone, Astroburgers, Coyns, Signal GK, air/raft, Scout/Courier, Far Trader, Misjump, and High Passage.
That's how T20 does it anyway. But it's clear even from that, that any terms specific to the Charted Space setting (including, oddly enough, "Charted Space" and "OTU" and "Official Traveller Universe"!) are not open content for T20. So it seems likely that they won't be declared Open Content for anything else either.