Historically, NASA mission information has not been maintained in any single, accessible authority. To both achieve its goal of creating better connections in GSFCIR and to provide a valuable resource to present and future NASA communities, the Goddard Library is producing a linked data thesaurus of NASA mission names, including equivalence, hierarchical, and associative relationships. This presentation focuses on how the Library established the need for a NASA-focused linked data missions thesaurus, the careful process of domain analysis and vocabulary development, and its role in aiding future digital curation efforts as GSFCIR grows with new collections.