NASA's New Horizons spacecraft flew within 8,000 miles of dwarf planet Pluto on July 14, 2015. Our view of this cold, previously unexplored world, 4.67 billion miles from Earth, has evolved since its discovery by Clyde W. Tombaugh in 1930. These short clips and images are from Tombaugh, Hubble and New Horizons over the years, arranged to illustrate improvements in resolution.