Instead of returning exposed film in reentry capsules, NASA had the Lunar Orbiters scan the film in space, convert brightness measurements into radio signals, and transmit them to deep-space communication centers in Spain, Australia, and the United States, where the images were reconstructed from magnetic tape.
Sources
- Moon photos from the 1960s were developed in space—here's how (nationalgeographic.com)
- https://www.space.com/6110-restoring-moon-lunar-orbiter-images-recovered.html (space.com)
- https://www.lindahall.org/about/news/scientist-of-the-day/lunar/ (lindahall.org)
- https://denniswingo.wordpress.com/2015/02/25/the-lunar-orbiter-image-recovery-project-last-mile/ (denniswingo.wordpress.com)
- https://space.skyrocket.de/doc_sdat/lunar-orbiter.htm (space.skyrocket.de)
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