NASA Spacecraft Embarks on Historic Journey into Interstellar Space by NASA
= NASA Spacecraft Embarks on Historic Journey into Interstellar Space by NASA
{c}
{title2=2013}
Official mission-team announcement, 12 September 2013: https://www.nasa.gov/news-release/nasa-spacecraft-embarks-on-historic-journey-into-interstellar-space/ . Cited passage: plasma-wave observations in April 2013, inferred electron density and the retrospective August 2012 heliopause crossing.