We found one dictionary that defines the word galactographically:

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1. galactographically: Wiktionary

Definitions from Wiktionary (galactographically) ▸ adverb:  Using galactography. ▸ Words similar to galactographically ▸ Usage examples for galactographically ▸ Idioms related to galactographically ▸ Wikipedia articles (New!) ▸ Words that often appear near galactographically ▸ Rhymes of galactographically ▸ Invented words related to galactographically