There's no Pluto though. :( //Beyond Earth by Stephen Di Donato - I love the colors going along with the main colors of the planets themselves, as well as how it coordinates with the background and words of each picture.
Calligraphy on a Phrase: Risk Failure by Patrick Cabral: very dramatic because of sharp, jagged curves, the contrast between the thick and thin lines, and the four straight lines on either side of each word
Many details of Saturn appear clearly in infrared light. Bands of clouds show great structure, including long stretching storms. Also quite striking in infrared is the unusual hexagonal cloud pattern surrounding Saturn