Side: The space age progress of the 1950s and 1960s, is one of the most baffling levels of technological progress. Analog computing (as the sibling comment here

Side: The space age progress of the 1950s and 1960s, is one of the most baffling levels of technological progress. Analog computing (as the sibling comment here by jschveibinz points out about OP article's tech) (and very primitive digital computing), fuel cells, advanced rocketry without FEA/CFD simulation software, literally de-accelerating to land on the moon, and then thrusting to take off again, the list goes on.