Five things we’ve learned since Voyager 2 left the solar system

One year ago, NASA’s Voyager 2 probe became just the second human-made object in history to exit the solar system and officially enter interstellar space. Voyager 2 was launched on August 20, 1977—16 days before its twin, Voyager 1, which exited the solar system’s northern hemisphere in 2012 . Voyager 2 was sent on a … Continue reading Five things we’ve learned since Voyager 2 left the solar system