EntityQ7201252· pop 7· linked from 74 articlesplanetary surfaceSign in to savewhere the solid (or liquid) material of the outer crust on certain types of astronomical objects contacts the atmosphere or outer spaceConnectionsEarthConceptSolar SystemEntity67P/Churyumov–GerasimenkoEntityHuygensEntitysample-return missionEntityplanetary coordinate systemEntityMoonConceptastronomyEntityMarsEntityVenusEntitystarEntityhumanEntityPlutoEntityNeil ArmstrongPersonevolutionEntitysulfurEntityNASAConcepticeEntityrockEntityInternational Standard Book NumberEntityCategoriesPlanetary geologySurfaces