On Thursday, December 8, 2022 at 2:55:14 PM UTC-7, a425couple wrote:
> "Burying the astronauts’ base beneath the ground is one
> relatively easy solution to this radiation problem. So is
> building it inside a cave – volcanic areas of Mars are the
> sites of lava tubes that now form huge tunnels, with access
> through partial roof collapses."
> I've read this often.
> How have we verified it? (other than in theory?)
Well, it has been experimentally verified on Earth that
a thick enough layer of rock will attenuate radiation.
Are there convenient caves on Mars? Now, we don't
know _that_ for sure. But we do know that aluminum
foil or even aluminized Mylar can reflect light and is
light in weight, so you could take a large amount with
you to Mars, along with light structural supports.
And we know that there is sunlight available on Mars.
True, we know that if you melt permafrost, you get
goo that is very difficult to work with (something called
muskeg). But not impossible, especially if you only make
a little of it at a time.
So if you send _enough_ equipment to Mars, at vast
expense (but sending equipment to Mars, of course,
is vastly cheaper than sending _people_ there), that
you _could_ make a huge underground base, to which
you could then bring sunlight by means of an arrangement
of mirrors... does not violate any fundamental laws
Plant trees, grow algae, and you will manage to set up
an ecology that produces enough oxygen to support a
If you can support _enough_ humans to use that equipment
to make *another* underground habitat, you can, if you
wait long enough, have a population on Mars of any desired
size - since both plants and humans reproduce.