On Feb 28, 4:08 pm, "Koobee Wublee" <koobee.wub...@gmail.com> wrote: > On Feb 28, 10:44 am, "Randy Poe" <poespam-t...@yahoo.com> wrote: > > > On Feb 28, 1:24 pm, "Koobee Wublee" <koobee.wub...@gmail.com> wrote: > > > Apollo 11 astronauts receive a total radiation of 0.18 rad. 14 > > > receive 1.14 rads. > > > > Does that seem reasonable to go through the Van Allen Belts and back? > > > The spacecraft has very minimal shielding. > > > Yes. > > Not to me. > > > They didn't spend very *long* in the Van Allen belts. Total > > exposure is (dosage rate) * time. > > > You know that, right? > > Right. > > > > How about the radiation in > > > outer space beyond the Van Allen Belts? > > > Cosmic ray dosage was measured to be 0.001 rad per hour > > in outer space outside the Van Allen belts, and about 0.0006 > > rad per hour on the surface. It is less on the surface because > > cosmic rays, being massive particles, only come from above > > when you're on the surface, whereas they come from all > > directions when you're in space. > > Your figure of radiation dosage in outer space beyond the Van Allen > Belts is unrealistically low.
"Cosmic ray fluxes, consisting of completely ionized atomic nuclei originating outside the solar system and accelerated to very high energies, provided average dose rates of 1.0 millirads per hour in cislunar space[**] and 0.6 millirads per hour on the lunar surface."
> That translates to less than 10 RADs > per year. That environment is not as benign as you think.
It's not benign at all. Aircraft crews experience increased cancer risk just by spending more of their working life in the upper atmosphere compared to us groundlings.
Now what are your numbers and where do they come from?
> The > radiation dosage is close to the outer edge of the Van Allen Belts > such as the geosynchronous orbit with a different mix of radiation > sources.
What radiation dose? You mean that everywhere between earth and moon the radiation levels are comparable to the edge of the Van Allen Belts? What makes you think so?
