When NASA's New Horizons spacecraft makes its closest pass to Pluto on Tuesday morning, eastern time, it will mark a reunion of sorts between the dwarf planet and the scientist who discovered it in 1930
A portion of Clyde Tombaugh's ashes...
When NASA's New Horizons spacecraft makes its closest pass to Pluto on Tuesday morning, eastern time, it will mark a reunion of sorts between the dwarf planet and the scientist who discovered it in 1930
A portion of Clyde Tombaugh's ashes...