Re: Space travel by humans is not possible now

On 23 Jan, 21:08, Einar <eina...@xxxxxxxxx> wrote:
On Jan 23, 2:44 pm, jacob navia <ja...@xxxxxxxxxx> wrote:





Einar wrote:

This Mars talk is mostly hypothetical, as a Mars mission is very
unlikely to occur within the next 30 years.

But if we take examples from Earth, Eskimoes could achieve fairly
reasonable temperatures within iglooes...where the temperatures were
as bad as - 50C. Now, a hypothetical Mars dvelling might be dug down a
bit, say halfway down, then the remainder covered with material taken
from the surrounding ground.

It sounds reasonable that such a low tech approach can achieve pretty
reasonable degree of protection from the environment. Then add in
hightech equipment to close the loop.

Yes, underground the temperature can be higher. But -80 to -100
are normal night time temperatures.

And the problem is that this approach doesn't work with *vehicles*

--
jacob navia
jacob at jacob point remcomp point fr
logiciels/informatiquehttp://www.cs.virginia.edu/~lcc-win32

Well, Eskimoes could live in - 50C within theyr snow houses. With
modern tech thrown in, we undoubtedly can do better than that.

It´s also somtimes cold on the Moon, when in shadow. I recall they did
make some use of rovers up there in the early 70s. What you need is a
spacesuit, with comparable heating/cooling capability. The rover could
charge the suit while the astronaut is aboard.

However, the main obstackle to long term operation may be radiation.

One factor we tend to be losing sight of is the rapid advance of
robotics. If the consensus is that there will not be a manned landing
on Mars for 30 years at least, one asks oneself where robotics will be
at that point. I think there is a real danger that we will plan a trip
to Mars and then find out as the years advance that it isn't really
worthwhile anyway.


- Ian Parker
.

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