Ariel "Space Hack" Waldman and Lisa Ballard created Spaceprob.es, a delightful catalog of the (human-made) space probes flying around our solar system and beyond, from the far-out Voyager 1 to the just-launched DSCOVR.
You can learn about the various probes and even purchase a cool sheet of stickers emblazoned with these spacecrafts' silhouettes! Spaceprob.es