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Old 2021-07-01, 00:15   #42
diep
 
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Sep 2006
The Netherlands

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kriesel: there is a difference in some sort of emergency facility where you can live for a short while and a permanent base which needs to be a bunker deep underground to shield against the radiation of the sun and where there is enough room to grow vegetables.

A manned mission to Mars would be a years long project for humans to stay on Mars for many many years and if having bad luck with yet another few rockets that explode or get damaged or simply do not arrive there is all sorts of problems you encounter.

Imagine that on ISS the astronauts would need to grow their own food. How much larger that would make ISS and the extra facilities you need on there.

Now project that onto Mars.
A small cabin is not enough.

You need a full blown undergrounds quarter which is entirely pressurized. Obviously you use materials on Mars itself for something like that. Yet to build something like that and maintain it - is a total different league than what you might guess.

And it may not leak.

Remember that what astronauts on ISS get exposed to would be difficult to expose those on Mars to. So you would want to shelter them from such radiation. Now we've had several astronauts in ISS there for quite some time - yet the damage done to a person there would not be acceptable on a quarters on Mars.

You cannot build something there and say: "heh if you stay longer than 2 years here you are dead for sure".
Or: "heh if you stay 5 years here we know 100% sure you are 99% dead because of cancer as you swallowed too much radiation for sure then".

So you need something underground there which is pretty huge and has that much space that you can have redundancy.

Obviously that involves raw materials sourced on Mars as well.

So change the thinking from something ad hoc that might just be enough to: huge and redundant.

It's similar like building a small rocket versus larger rocket.

You and i probably can build a small rocket of a couple of meters say a meter or 7 here in my workshop.
In parts obvously. And assembling would not be possible in my office of course as it wouldn't fit through the door such rocket. So you assemble it elsewhere in a garag. We can launch it. It will work. Garantueed.

But when you scale up such rocket and build a much larger one - say 15 meters tall - which can go more than 100KM high and potentially travel to ISS with some very small cargo - then just 'enlarging' the rocket isn't enough. Complexity suddenly changes then.

That's what a manned mission on Mars is too.

We hear all sorts of 'good weather' information on travelling times to Mars for example.
With some 'faster rocket' it would be possible to go there faster.

Sure - best case. But what if you have an EMERGENCY mission to Mars to deliver some much needed parts there?

Those cargo rockets of course are gonna be slow ones and suddenly traveltime is a year - and what if it crashes on arrival there?

They dead then over there?

Please try to realize the scaling up problem.
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