NASA spacecraft recorded a jump in plasma density like Voyager 1 did on entering the interstellar medium in 2012.
Studying the the pressure at the edge of the solar system can help us to better understand the influence of the sun on interstellar space.
The Voyager mission has revolutionized our understanding of the outer Solar System.
The original "Pale Blue Dot" is a famous image of Earth taken from a distance of around 3.7 billion miles by the Voyager 1 spacecraft.
Take your soundtrack out of this world with a boxed set of Earth's greatest hits.
Space agency will host a live event to celebrate the probe on September 5.