The bow shock-wave - very high subsonic flight, just below the speed of sound. Some surfaces of the aircraft are already supersonic - there is local supersonic flow. The mass condensation occurs in the low pressure area directly behind the bow shock-wave.
REDIFINING THE DOME --- Brunelleschi created for Santa Maria del Fiore in Florence a vault of unparalleled magnificence that remains to this day the world’s largest masonry dome. By Fernando G. Published on February