Astronomy Picture of the Day . ... 22.06.2007 . ... Credit: NASA , ESA , L.McFadden, J.Y.Li ( UMCP ), M.Mutchler, Z.Levay ( STScI ), P.Thomas ( Cornell ), . ... These remarkably detailed Hubble Space Telescope images show brightness and color variations across the surface of the two small worlds. ... Though Shakespeare might not have been impressed, nomenclature introduced by the International Astronomical Union in 2006 classifies nearly spherical Ceres as a dwarf planet . ... June 2007 . ...