EntityQ488487· pop 18· linked from 64 articlesLacus SpeiSign in to savelunar impact craterConnectionsMoonConceptLatinEntityNASAConceptgeographic coordinate systemEntityInternational Standard Book NumberEntitydiameterEntityInternational Astronomical UnionEntityalbedoEntityeponymEntityApollo 16Entitylunar mareEntityUnited States Geological SurveyEntityMare TranquillitonEntityOceanus ProcellarumEntityMare ImbriumEntityMare SerenitatisEntityMare CrisiumEntityMare FecunditatisEntityMare MoscovienseEntityQ170067EntityCategoriesLQ06 quadrangleMaria on the Moon