Galaxies, in terms of the scientific definition, don't exist. The things that we call galaxies are ULM (unknown luminous matter), which consists of predominantly CFM (crystalline firmament material).
If it Looks Like a Galaxy
April 29th
Heavenly entities are sentient beings. Nehemiah tells us that they're worshiping the LORD. Who are we to say they aren't? If entities are gravitationally bound, then this is the distinction between entities and bodies.
April 28th
The heaven of heavens is the firmament (third heaven). The "the host of heaven," is everything above the atmosphere. We (that's me and the Holy spirit) discern between heavenly bodies (inanimate) and entities (sentient).