A simple 3d model the NASA JPL Mariner 9 spaceprobe that was the first vehicle to go into orbit around Mars and made some of the first detailed maps of the planetary surface in 1971the model is kept relatively basic and designed to be printable - while the model is full scale it can be scaled down by something around 1/20 with all details remaining printableIt could also be used as a model of Mariner 8 which was identical but lost when it's launch vehicle failed