🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaTiếng ViệtРусскийالعربيةفارسی中文日本語EntityQ664667· pop 25· linked from 202 articlesHelios Programpair of solar probes operated by NASA and DLRAvailable in 25 languagesEspañolFrançaisDeutsch中文日本語PortuguêsItalianoالعربيةAsturianBahasa IndonesiaBulgarianConnectionsOrbiting Solar ObservatoryEntityapsisEntityCategories1974 in spaceflight1976 in spaceflightDerelict satellites in heliocentric orbitGermany–United States relationsMissions to the SunNASA space probesSatellites of GermanySolar telescopesSpacecraft launched by Titan rocketsSpacecraft launched in 1974Spacecraft launched in 1976