Source: Spinal Cord Journal
NASA’s Voyager 2 spacecraft has crossed into interstellar space, joining its twin — Voyager 1 — which made the epochal passage in 2012.
Both Voyagers now sail beyond the reach of the Sun’s influence, the heliosphere, as humanity’s most distant emissaries. Voyager 1 is 21.6 billion kilometres from the Sun; Voyager 2 is 18 billion kilometres from the Sun.
Voyager 2 crossed the boundary on 5 November, said Ed Stone, Voyager’s project scientist at the California Institute of Technology in Pasadena, California. He made the announcement on 10 December at a meeting of the American Geophysical Union in Washington DC.
Stone said that the signal is much cleaner than it was for Voyager 1, which spent months tantalizing scientists with fluctuating signals.
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