John Savard
2024-03-24 04:47:32 UTC
At least so this news story claims:
https://www.unilad.com/technology/space/mars-declared-unsafe-humans-survive-four-years-356854-20240320
After four years on Mars, radiation exposure will exceed safe levels.
So, it is absolutely impossible for any humans to settle permanently
on Mars and make it their new home.
There are of course two fundamental errors in their logic.
Robert Zubrin would point out that "safe levels" that are established
by standards on Earth involve a very low tolerance for risk, and so
the information in the article only implies that people living on Mars
would have a somewhat greater cancer risk than people on Earth.
That doesn't make Mars uninhabitable any more than, say, Boulder,
Colorado is uninhabitable.
I would point out that while a certain amount of shielding does indeed
make cosmic rays worse, thanks to secondary radiation - something the
article alludes to - still more shielding eventually fixes that.
Otherwise, Earth's atmosphere would make cosmic radiation worse here
than in space.
Mars is a *planet*. So there is plenty of rock available to use for
shielding. I really doubt that people living, say, *75 feet
underground* on Mars will be in any particular danger from radiation,
and it's perfectly possible to use simple mirror systems to take
sunlight from the surface of Mars, and focus it and send it down a
very narrow hole to allow a deep artificial cavern to be well-lit.
On the bottom of the page on my web site
http://www.quadibloc.com/science/spa02.htm
I illustrate such an optical system.
We _can_ settle Mars, even if construction there will be more
expensive than on Earth.
John Savard
https://www.unilad.com/technology/space/mars-declared-unsafe-humans-survive-four-years-356854-20240320
After four years on Mars, radiation exposure will exceed safe levels.
So, it is absolutely impossible for any humans to settle permanently
on Mars and make it their new home.
There are of course two fundamental errors in their logic.
Robert Zubrin would point out that "safe levels" that are established
by standards on Earth involve a very low tolerance for risk, and so
the information in the article only implies that people living on Mars
would have a somewhat greater cancer risk than people on Earth.
That doesn't make Mars uninhabitable any more than, say, Boulder,
Colorado is uninhabitable.
I would point out that while a certain amount of shielding does indeed
make cosmic rays worse, thanks to secondary radiation - something the
article alludes to - still more shielding eventually fixes that.
Otherwise, Earth's atmosphere would make cosmic radiation worse here
than in space.
Mars is a *planet*. So there is plenty of rock available to use for
shielding. I really doubt that people living, say, *75 feet
underground* on Mars will be in any particular danger from radiation,
and it's perfectly possible to use simple mirror systems to take
sunlight from the surface of Mars, and focus it and send it down a
very narrow hole to allow a deep artificial cavern to be well-lit.
On the bottom of the page on my web site
http://www.quadibloc.com/science/spa02.htm
I illustrate such an optical system.
We _can_ settle Mars, even if construction there will be more
expensive than on Earth.
John Savard