(NASA's Juno craft, exploring the greater Jupiter system, also carries a vault.) Mashable Light Speed Want more out-of-this world tech, space and science stories? Sign up for Mashable's weekly ...

In 1977, NASA launched Voyager 1 and 2 on a mission to explore the outer planets. Now, over 45 years later, these incredible probes are detecting something mysterious beyond the edge of our solar ...