보이저1호는 2호보다 16일 늦게 발사됐지만 빠른 궤도를 택하고 속력도 높아 2012년 성간우주에 진입했으나 PLS가 고장 난 상태다.
Though Voyager 1 was launched on the 16th which was later than Voyager 2, it entered into the interstellar medium in 2012, for it took the fast orbit and had a high speed, but now its PLS is out of order.