I’ve enjoyed looking at these photos of Pluto from 3 billion miles away. Just for fun last night, I found some information on the old Lunar Orbiter probes that mapped the moon from 1966 to 1967 in preparation of the Apollo landings. You should take a look at the technology they had to use to transmit the photos of the lunar surface. By our standards, primitive. The probe took film photos, processed and developed the images, and then had to convert them into digital images to transmit to earth. Primitive, but also ingenious.