Comments by "" (@maxfan1591) on "Apollo 17 - The Last Men on the Moon | Part 1 | Free Documentary History" video.
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@dannyhendy "many many reasons. But simply the fact that putting a probe on the moon in the 2020s has normally failed."
The Chinese have succeeded with two rover-landing missions and one sample-return mission and no failures, and another sample-return mission currently underway. India has successfully landed a spacecraft on the Moon too.
"No need for return"
Apart from the Chinese sample return mission.
"(which makes a mission hundreds of times more difficult),"
Yes, it's more difficult.
"and with no need to consider life support"
True, but that makes the mission cheaper, and not necessarily easier.
"(coupled with the need to return now makes the mission thousands of times harder) and with tech that is literally millions of times more powerful."
Manned missions have two big advantages over unmanned missions: first, the crew can steer the spacecraft away from a potentially disastrous landing site; second, the crew can fix or manage problems which might otherwise leave an unmanned mission stranded.
The Apollo lunar module was designed to be able to land by itself, but it was also designed to be manually controllable. In the case of Apollo 11, an automated landing would almost certainly have resulted in disaster as the LM was aimed at land which had a lot of large boulders. And with Apollo 12 the LM was likely to land on the slope inside a crater. In each case the astronauts' manual control steered the LM away from disaster.
In the case of Apollo 14, a piece of loose solder floating around inside the LM's circuits intermittently caused the Abort switch to set. If that had happened during powered descent, the LM would have automatically aborted its landing attempt. The crew on board were able to enter a series of commands to work around the problem, and allow the mission to continue.
The unmanned missions which have failed are a couple of orders of magnitude cheaper than each Apollo mission. With that sort of discount, you end up with inherently less reliable vehicles. If you actually read what happened with the failures, a common factor seems to be that not enough software or integrated testing was done; and that seems to be simply a result of not enough money to employ enough programmers or engineers to test everything. Instead, they do what testing they can within the limits of their budgets, and hope for the best.
By contrast, Apollo was hugely expensive because they did a lot more testing, and in the process found a bunch more problems that needed to be fixed.
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