Voyager 2 was launched in August 1977, 16 days before Voyager 1.
Voyager 2 probe moves into interstellar space
Eleven billion miles from Earth, NASA's long-lived Voyager 2 probe, still beaming back data 41 years after its launch in 1977, has finally moved into interstellar space, scientists revealed Monday, joining its sister ship Voyager 1 in the vast, uncharted realm between the stars.
