Bruce Murray Space Image LibraryEvery round object in the solar system, to scale (widescreen) Every round object in the solar system, to scale (widescreen) Global views of round worlds across the solar system taken by a dozen different spacecraft. The boundary between round and not-round occurs between around 400 and 600 kilometers' diameter, depending on the composition of the world. The trans-Neptunian objects in lower right corner are represented by artworks except for Pluto and Charon. Montage © 2011 Emily Lakdawalla, The Planetary Society. Image data courtesy NASA/JPL and JHUAPL/CIW. Image processing by Bjorn Jonsson; Mattias Malmer; Ted Stryk; Gordan Ugarkovic. TNO artwork by A. Feild (STSCI)This montage was updated in January 2020 to include New Horizons images of Pluto and Charon.A higher-resulution PNG formatted image is also available.