WASHINGTON, United States (AFP) — NASA’s Voyager 2 probe has left the protective bubble around the Sun and is flying through interstellar space, becoming the second human-made object to travel so far, the US space agency said Monday. The announcement came six years after its twin spacecraft, Voyager 1, broke the outer boundary of the heliopause, where the hot solar wind meets the cold, dense space between stars, known as the interstellar medium. Voyager 2 […]