... The images that make up this mosaic were sent back from NASA s New Horizons spacecraft from September 5 to 7, 2015. The image is dominated by the informally named icy plain Sputnik Planum, the smooth, bright region across the center. ... The smallest visible features are 0.5 mile (0.8 kilometer) in size, and the mosaic covers a region roughly 1,000 miles (1,600km) wide. The image was taken as New Horizons flew past Pluto on July 14, 2015, from a distance of 50,000 miles (80,000km). ...