References 487% 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
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]90%nasa.gov/news-release/nasa-spacecraft-embarks-on-historic-journey-into-interstellar-spacenasa.gov· Posted Oct 5, 2026· Starts Aug 25, 2012 ✓· 25% of score
NASA's[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.
- [2]92%Voyager 1 - NASA Sciencescience.nasa.gov· Added Oct 5, 2026· 25% of score
Official page: Aug. 25, 2012 exit from the heliosphere, launch date, working instruments.[1]
- [3]85%Voyager 1 - Wikipediaen.wikipedia.org· Added Oct 5, 2026· 25% of score
Date 25 Aug 2012, 121 AU, Pioneer 10 overtaken 1998.[1]
- [4]82%Heliosphere - Wikipediaen.wikipedia.org· Added Oct 5, 2026· 25% of score
Second date source: 25 Aug 2012, fortyfold plasma density jump; Voyager 2 on 5 Nov 2018.[1]
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