Praise him, ye heavens of heavens, and ye waters that be above the heavens. Heavens of heavens - Heavens exceeding heavens. Systems of systems extending as far beyond the solar system, as it does beyond the lowest deeps. The endless systematic concatenation of worlds.
Ye waters that be above the heavens - This refers to Genesis 1:7 (note), where see the notes. Clouds, vapours, air, exhalations, rain, Snow, and meteors of every kind.