I find 'rocket science' quite interesting, who not :) But my knowledge is limited to what can grasp from watching the channels discussing the topics every now

I find 'rocket science' quite interesting, who not :) But my knowledge is limited to what can grasp from watching the channels discussing the topics every now and then and reading some of the lightweight books. (I find the design and creation of the space suits very interesting). Nevertheless when I saw the Smarter Every Day video the first time the biggest question mark for me was the number of rockets required to reach the moon _once_ [1] There were some other topics from the talk like the cryogenic refueling never done before [2], the orbit around the moon [3]. But for these I cannot evaluate who much of a problem they are. But more than eight rockets for one flight sounds a lot, even without expertise. [1] https://youtu.be/OoJsPvmFixU?t=1746 https://youtu.be/OoJsPvmFixU?t=1746 [2] https://youtu.be/OoJsPvmFixU?t=2609 https://youtu.be/OoJsPvmFixU?t=2609 [3] https://youtu.be/OoJsPvmFixU?t=1385 https://youtu.be/OoJsPvmFixU?t=1385