EntityQ1781732· pop 17· linked from 404 articlesExplorer 49Sign in to savesatellite launched by NASA for long range radio astronomyConnectionsEuropean Space AgencyEntityLunokhod programmeEntitylunar orbitEntityMoonConceptaluminiumEntityNASAConceptUTCEntitywattEntityApollo 11Conceptpublic domainEntityApollo programConcepthertzEntityeclipticEntityorbital periodEntityIndian Space Research OrganisationEntityapsisEntityRoscosmos State CorporationEntityArtemis IIConceptSkylabEntityApollo 13ConceptCategories1973 in spaceflightExplorers ProgramMissions to the MoonSource attributionSpacecraft launched in 1973