Assertion: spacecraft | /r/CapableOf | cross the heliopause
Facets:
value: in august
type: TEMPORAL
Source sentences:
text: On August 25, 2012, Voyager 1 became the first spacecraft to cross the heliopause and enter the interstellar medium.
text: Voyager 1 became the first spacecraft to cross the heliopause in August 2012, then at a distance of 121 AU from the Sun, although this was not confirmed for another year.