At more than 10 billion miles away from Earth, there is no day and night. Time and space are fathomless and our Sun is a distant point of starlight—a faint reminder of the home NASA’s twin Voyagers, humanity’s farthest and longest-lived spacecraft, left behind 40 years ago. Voyager 1, which launched on Sept. 5, 1977, and Voyager 2, launched on Aug. 20, 1977, continue to return data that shape our view and understanding of our place in the universe.