galactographic · adjective1
From galactography (“x-ray examination used to evaluate breast fluid”) + -ic.
galactographic · adjective2
From galactography (“science of charting and mapping galaxies”) + -ic. Coined by American science fiction author Isaac Asimov in 1950 in the final installment of the novella "...And Now You Don't" (collected as part of Second Foundation).
Etymology from Wiktionary, CC BY-SA 4.0.