[zo1]

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" Znamya was an experiment in orbital lighting—using orbiting mirrors to light parts of the earth (or even entire cities) at night with reflected sunlight.

The idea behind the program was that a collection of orbiting mirrors could be used to extend the length of daylight hours for harvests, major construction projects, and disaster response operations, a concept originally concocted by German space theorist Hermann Oberth (one of the fathers of modern rocketry) in the 1920s "