Paint by Number

When Mariner 4 flew past Mars in summer 1965, NASA scientists were eager to get their first close look at another planet. So rather than wait for their computers to render the probe’s data into a proper photograph, the employees in the agency’s telecommunications group mounted printed strips of data in a display panel and colored them by hand to create a rough visualization.

The hand-colored vista became the first image of Mars based on data collected by an interplanetary probe. They framed the finished image and presented it to agency director William H. Pickering.