Space

In DS9 broken link, bashir said "If we go into dominion airspace without cloaking, we'll get their attention.". That doesn't seem to make any sense. In space, territory is referred to as space, not airspace. Airspace only refers to territory in a planet's atmosphere. For example, dominion space, not dominion airspace. So why did he say airspace, instead of space?

Can all changelings (founders' species) (in particular, odo, and the female changeling) fly in space like laas, and why? How fast can they travel? How do they navigate? How do they communicate? How do leave, or return back to a planet's surface?

I really like ENT regeneration, and think it's one of the best star trek episodes. However, one thing that doesn't make sense is the borg can survive and function effectively in the cold temperatures of space (-270.45°C), and yet they got frozen in the ice and snow of the arctic (-40°C). Why couldn't they survive in the arctic, if they could survive in space? Do you think that makes any sense, and why?

Who is ready for the final episode of star trek discovery it will hard i think now that the captain is gone somewhere that nobody knows so the end will be good or bad i want to know right now

With all their insight into the connections between space, dimensions, time, and thought, the Travelers would definitely give the Q a good run for their money, if you catch my drift. Plus, if a Traveler was given Q powers, I think that'd be quite a potent mix if they used those combined abilities for others' benefit.