Re: Google/X-Prize Moon Contest

On Sep 20, 11:53 am, Len <l...@xxxxxxxxxxxxxx> wrote:
On Sep 20, 2:28 pm, Einar <eina...@xxxxxxxxx> wrote:





Len wrote:
On Sep 18, 12:25 am, fairwa...@xxxxxxxxx (Derek Lyons) wrote:
Alan Anderson <arand...@xxxxxxxxxxxxx> wrote:
"Jeff Findley" <jeff.find...@xxxxxxxxxxxxxx> replied to "Jim Relsh"
<jrel...@xxxxxxxxx>:
Are you saying tourist flights to the Moon would be far to dangerous? If
so, what makes them more dangerous than the existing Soyuz tourist flights?

The cislunar environment is subject to more radiation than one finds in
Low Earth Orbit. I'd call that a legitimate reason for considering
flights to the moon to be more dangerous than flights to a LEO station.

Of course, a reasonable design for a lunar tourism vehicle would take
that into consideration and provide enough shielding to address the
problem.

Such shielding, for the brief duration of a lunar flyby or brief
orbital/landing visit, is trivial to provide.

Remember, radiation is dangerous not just in proportion to the
strength - but the duration of exposure.

Although I would like to be unconcerned, I am concerned
about solar flares during the transit from LEO to the moon's
surface (and back). Currently, I suspect that about 30 cm of
water in a storm cellar would be necessary to protect tourists
from an unpredicted solar flare. I would like to be wrong;
perhaps I could use some enlightenment on this subject.

Henry has pointed out that it is better not to worry about
cosmic rays. Limited exposure time would see to be the
best answer to cosmic rays. But I am not so sure about
solar flares. The luck factor may have been sufficient for
Apollo, but may not be for space tourism.

Len

D.
--
Touch-twice life. Eat. Drink. Laugh.

http://derekl1963.livejournal.com/

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL

I wonder if ideas for plasma shields have progressed beyond the
concept stage.

Einar

I don't know. I would welcome a good solution to the
solar flare problem.

I'm not even sure whether I am overly worried about
the problem--or not worried enough.

Trust those regular laws of physics and the best available science,
you're not worried enough unless it's robotics that's going to visit
that physically dark and nasty moon of ours.

Ever taken any one on one notice as to how much darker and rather
nasty deep golden brownish that fully solar illuminated moon actually
is, such as obtained within the very exact same FOV relationship as to
having included mother Earth that's not even half as bright as Venus
would have been depicted.
http://www.lpi.usra.edu/resources/apollo/
There are actually many other examples within those Apollo archives,
as well as more than a few others ever since, that is if you'd care to
look.

Though Venus was always a much smaller crescent item to have included,
its nearly three fold brightness to that of Earth, of what such an
unfiltered Kodak moment should have easily recorded with dynamic range
to spare, is further proof positive that our rad-hard astronauts never
set any moonboot on that physically dark and nasty moon of ours.

There's simply no freaking way that any of those NASA/Apollo EVA
unfiltered Kodak moments were obtained as having been officially
stipulated, and unfortunately for our NASA/Apollo freaks of nature,
there's so much more that doesn't add up.
- Brad Guth -


.

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