Assertion: voyager spacecraft | /r/AtLocation | operation
Facets:
value: since 1977
type: TEMPORAL
Source sentences:
text: The Voyager 2 spacecraft, which has been in operation since 1977 and is the only spacecraft to have ever visited Uranus and Neptune, has made its way to interstellar space, where its twin spacecraft, Voyager 1, has resided since August 2012.