C.E. Evans wrote:
It's possible that the Galaxy-class may have impulse deflection crystals too--there's two large blue glowy areas above and roughly between the saucer impulse engines--or they might be something totally unrelated.
I think those were the arboretum windows
 hmm . . . Memory Alpha says that the Galaxy class arboretum was on deck 17 which would place it on the lower portion of the saucer