Although Bombax Press typically includes both indices and dictionaries for Latin novellas, Astronomia: Fabula Planetarum differs from this precedent. Astronomia contains an Index Verborum, which contains all the words used in the novella. It lists all verb forms separately, but it groups together the nouns and adjectival forms of the word. The Index Verborum provides readers with the opportunity to look up any word form that is unfamiliar.
