Astrobiology is the study of life in space.
During all that time a treasure trove of images has been transmitted to Earth and this NASA site is where to find them. The place is large enough easily to justify its own search facility. Images can be searched by scientific objective, orbit number, or key word, and they can be downloaded in various sizes and formats. They are numerous and stunning enough that you could sit mesmerized by your computer monitor for days. The Jupiter system has often been described as a solar system within a solar system, with its huge number of satellites, including volcanically restless Io, icy Europa, cratered Callisto, and magnetic Ganymede, all well represented in the image libraries, along with pictures of the Earth, Venus, some asteroids, and a comet taken during Galileo's long journey to Jupiter.