Jet Propulsion Laboratory, 4800, Oak Grove Drive, Pasadena, Los Angeles County, California, 91109, United States
NASA
CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins87% CONFIDENCEOverall confidence: 87%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
NASA's[1][2] Voyager 1 mission page states that on Aug. 25, 2012 the spacecraft became the first to exit the heliosphere, and English Wikipedia[3][4] and its Heliosphere article both give 25 August 2012; NASA's 12 Sept 2013 release says the date was worked out afterwards, from plasma oscillations, as August 2012.On 25 August 2012 NASA's Voyager 1 crossed the heliopause about 121 AU from the Sun, the first human-made object to reach interstellar space; NASA confirmed it on 12 September 2013.
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