dome, an arched structure above a roof; hence, figuratively, the heavens.
"McGuffey's Fifth Eclectic Reader"
William Holmes McGuffey
dome-shaped, it towered up in a graceful rainbow curve to a tremendous height; and round its base the surf broke gently in little waves of white.
"The Voyages of Doctor Dolittle"
Hugh Lofting
dome Nine rose from the swirling mist before them.
"General Max Shorter"
Kris Ottman Neville