I like the style promoted by The Gregg Reference Manual because it is simple and straightforward. Regarding hyphenated words, Gregg says, In a heading or title, capitalize all the elements except articles, short prepositions, and short conjunctions.. In Gregg, short means fewer than four letters. Following the Gregg way, both parts of Tune-Up are capitalized because up is an adverb in that expression.
A geodesic dome is a sphere-like structure composed of a complex network of triangles. The triangles create a self-bracing framework that gives structural strength while using a minimum of material.
onion dome-a dome that is shaped like a bulb; characteristic of Russian and Byzantine church architecture. pressure dome-a dome-shaped building that is pressurized. roof-a protective covering that covers or forms the top of a building. whispering dome, whispering gallery-a space beneath a dome or arch in which sounds produced at certain points are clearly audible at certain distant points.