NASA Voyager 2 becomes 2nd human-made object to exit Solar System
NASA on Monday announced that its Voyager 2 spacecraft became the second human-made object to leave the Solar System on November 5. Voyager 2 was launched on August 20, 1977, 16 days before the Voyager 1, which had entered interstellar space in 2012. NASA revealed the space probe was now over 18 billion km from the Earth.