It is actually more difficult because superpowers are not willing to spend unlimited money just to get ahead (like during Cold War). You can brute force a lot of technical problems by just using money (for example just one big expensive engine like Apollo 11). Nowadays nobody is willing to spend that kind of money for just one mission.
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It is actually more difficult because superpowers are not willing to spend unlimited money just to get ahead (like during Cold War). You can brute force a lot of technical problems by just using money (for example just one big expensive engine like Apollo 11). Nowadays nobody is willing to spend that kind of money for just one mission.