NASA JPL has recently released 15 new awesome and inspiring space travel posters. They are downloadable for free in hi-res, and ours to print. The sizes are 20 x 30 inches. The posters include relatively nearby locations such as Mars, and farther-out more exotic planets such as Jupiter’s Galilean moon Europa, and the dwarf planet Ceres, to even planets outside our Solar System, such as Kepler-16b which astonishingly orbits a binary star system.
Check out the posters here: