New Horizons is carrying the ashes of Pluto's discoverer to Pluto

Later this week, NASA's New Horizons probe will finally be close enough to Pluto to begin observing the dwarf planet and its moons. Along with a bevy of scientific instrument, the probe has also been carrying a sentimental payload: a tiny tin of the ashes belonging to Clyde Tombaugh, also known as the man who discovered Pluto.