First Spacecraft to Reach Interstellar Space…?

Fascinating article from Time Magazine concerning Voyager 1, a spacecraft sent from Earth way back in 1977 which may now be reaching the edge of the Solar System…and entering into Interstellar space, making it the first such craft to do so:

What is depressing to consider is the fact that this spacecraft was launched some 35 years ago and is only now reaching the edge of the Solar System, having traveled an incredible 11 BILLION miles.