Voyager 1 at 40: An epic tour of the solar system

In August and September 1977, Nasa's probes Voyager 2 and Voyager 1 were launched. Since then the two spacecraft have been exploring our Solar System and interstellar space. Exceeding all expectations, the probes have taught us so much about our planets and beyond. The Voyager mission's chief scientist, Professor Ed Stone, looks back over Voyager's highlights.

Photo: An image of Jupiter, relayed back to Earth by Voyager 1 Credit: NASA