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Originally posted by FoosM
Correct me if I am wrong, but those charts are in Sieverts (Sv), right?
1 Sv = 100 rads or 100 rem.
So... if we look at 30 deg inclination
930 Sv = 93,000 rem or rads (thats like 3,875 rem an hour... and 65 rem a minute)
and
160 Sv = 16,000 rem or rads (thats like 666 rem an hour... and 11 rem a minute)
So how much shielding would be required to cut that down to safe levels?
Just less than 10 minutes at the first height would be fatal.
edit on 11-8-2011 by FoosM because: (no reason given)edit on 11-8-2011 by FoosM because: (no reason given)
Unfortunately calculating the average radiation dose received by an astronaut in the belts is quite intricate in practice, though not too hard in principle. One must add up the effects of all kinds of particles, of all energies. For each kind of particle (electrons and protons in this situation) you have to take account of the shielding due to the Apollo spacecraft and the astronaut space suits. Here are some approximate values for the ranges of protons and electrons in aluminum:
Range in Aluminum [cm] Energy
[MeV]electrons protons
1 0.15 ~ nil
3 0.56 ~ nil
10 1.85 0.06
30 no flux 0.37
100 no flux 3.7
For electrons, the AE8 electron data shows negligible flux (< 1 electron per square cm per sec) over E=7 MeV at any altitude. The AP8 proton compilations indicates peak fluxes outside the spacecraft up to about 20,000 protons per square cm per sec above 100 MeV in a region around 1.7 Earth radii, but because the region is narrow, passage takes only about 5 min. Nevertheless, these appear to be the principal hazard.
These numbers seem generally consistent with the ~2 rem doses I recall. If every gram of a person's body absorbed 600,000 protons with energy 100 MeV, completely stopping them, the dose would be about 50 mSv. Assuming a typical thickness of 10 cm for a human and no shielding by the spacecraft gives a dose of something like 50 mSv in 300 sec due to protons in the most intense part of the belt.
For comparison, the US recommended limit of exposure for radiation workers is 50 mSv per year, based on the danger of causing cancer. The corresponding recommended limits in Britain and Cern are 15 mSv. For acute doses, the whole-body exposure lethal within 30 days to 50% of untreated cases is about 2.5-3.0 Gy (Gray) or 250-300 rad; in such circumstances, 1 rad is equivalent to 1 rem.
So the effect of such a dose, in the end, would not be enough to make the astronauts even noticeably ill. The low-level exposure could possibly cause cancer in the long term. I do not know exactly what the odds on that would be, I believe on the order of 1 in 1000 per astronaut exposed, probably some years after the trip. Of course, with nine trips, and a total of 3 X 9 = 27 astronauts (except for a few, like Jim Lovell, who went more than once) you would expect probably 5 or 10 cancers eventually in any case, even without any exposure, so it is not possible to know which if any might have been caused by the trips.
Much of this material can be found in the 1999 "Review of Particle Properties", (see below) in the sections on "Atomic and nuclear properties of materials", on "Radioactivity and radiation protection", and on "Passage of particles through matter".
Originally posted by backinblack
If the only fake part was actually the maned aspect then how would Russia know??
I don't believe that's a sustainable argument as most have not challenged the fact that the US did get craft to the moon..
Originally posted by Exuberant1
Originally posted by FoosM
We have been through this a thousand times. If you cant figure out by now why it was worthless for the Russians to expose the scam if they knew about it, then thats your problem.
The opponent is probably attempting to drive you in a circle to monopolize your time.
Originally posted by Exuberant1Anyhow,
At the time I wouldn't believe some sore loser commie if he said we didn't go to the moon.
The Soviets wouldn't even be able to produce pictures of empty landing sites. And even if they did I would have said they took them before the Apollo missions got there.
Obviously the soviet union cannot be trusted.
Originally posted by backinblack
reply to post by MacTheKnife
I don't know about that...
It's 2011 and they lost contact of an experimental craft just last week..
Seems tracking isn't what it's cracked up to be even now..
Edit: But then there's always the scenario that the astronauts were never in the craft...edit on 15-8-2011 by backinblack because: (no reason given)
Originally posted by Komodo
reply to post by FoosM
Yea FoosM, I totally agree about the sunshield/visor, especially when one of the astronauts had to be TOLD to put their sun visor down.. as he looked directly at the sun and then said..
"but I can't see anything with it up" .......still think that hilarious~!!
165:01:54 Parker: Hey, Jack. And we see your gold visor is up. You may want to put it down out here in the Sun.
[Jack climbs out of the crater and moves cross slope, angling uphill and to the east.]
165:02:02 Schmitt: Well, I think I might...I can't see with it down; it's scratched! Bob, I'll use it. I think I can cmonitor that one (meaning his visor). (Pause)
Originally posted by Komodo
... and the heat from the sun doesn't melt pictures left on the surface of the moon either.. it's so comfy and cozy up there ya know...
Originally posted by backinblack
What CME's ??
No, go back and Weedwhacker etc were stating they altered the attitude to protect from the belts...
Now I see that is BS yet no one, even you, mentioned that...
Originally posted by nataylor
Originally posted by backinblack
What CME's ??
No, go back and Weedwhacker etc were stating they altered the attitude to protect from the belts...
Now I see that is BS yet no one, even you, mentioned that...
Can you point out any posts that talk about change the attitude of the craft to protect against radiation in the VABs? I'm pretty sure whenever I've talked about that, it has been in relation to solar radiation.
Maybe my Google-fu is weak, but here are some posts I could find talking about that: From me, From Weedwhacker, From theability
So how long do you think it would take to melt pictures on the Moon ? Would it take longer or shorter than leaving those same pictures out on the surface of the Earth in the morning sunlight ? I've yet to have film melt in my camera when out all day. What makes it hot or cold on the Moon ? Would it be sunlight ... from the same Sun that makes it hot and cold (during the day and night) here on Earth ?
Originally posted by Komodo
reply to post by MacTheKnife
just something about it being 212*F on the surface on the light side.. right.. or you failed to take that into account .. and go ahead.. put your film in a oven and turn it up to 212*F .. I'm SURE it will come out as good as it was put in ..
So how long do you think it would take to melt pictures on the Moon ? Would it take longer or shorter than leaving those same pictures out on the surface of the Earth in the morning sunlight ? I've yet to have film melt in my camera when out all day. What makes it hot or cold on the Moon ? Would it be sunlight ... from the same Sun that makes it hot and cold (during the day and night) here on Earth ?
just follow your logic .. right..
Originally posted by FoosM
Correct me if I am wrong, but those charts are in Sieverts (Sv), right?
1 Sv = 100 rads or 100 rem.
So... if we look at 30 deg inclination
930 Sv = 93,000 rem or rads (thats like 3,875 rem an hour... and 65 rem a minute)
and
160 Sv = 16,000 rem or rads (thats like 666 rem an hour... and 11 rem a minute)
So how much shielding would be required to cut that down to safe levels?
Just less than 10 minutes at the first height would be fatal.
edit on 11-8-2011 by FoosM because: (no reason given)edit on 11-8-2011 by FoosM because: (no reason given)
Affirming the consequent.
Originally posted by FoosM
Originally posted by 000063
Originally posted by Komodo
reply to post by FoosM
bah~! why doesn't the USA just call it what it was/is and chalk it up to a time where the country formerly known as the USSR as our enemy and we just could loose..........no matter what the ......cost..
Ah, yes, so NASA faked going to the moon, because of the Russians, and then Russia didn't expose them because--
Hm. That's odd. There's not a single credible theory. Even the usual "wheat deal" HBs like to throw out before changing the subject as quickly as possible doesn't explain why the USSR didn't just expose the US anyway and use the wheat as proof, or blackmail them for, oh, the entire duration of the Cold War.
We have been through this a thousand times. If you cant figure out by now why it was worthless for the Russians to expose the scam if they knew about it, then thats your problem.
I assure you, I believe FoosM has plenty of time with which to respond to my and everyone else's comments. I use "respond" loosely, of course.
Originally posted by Exuberant1
The opponent is probably attempting to drive you in a circle to monopolize your time.
They would have tons of records and evidence, more than enough to create serious doubt in the eyes of the world, to tarnish the US' reputation. Heck, even enough credible-seeming false "evidence" of the hoax would be bad.
Anyhow,
At the time I wouldn't believe some sore loser commie if he said we didn't go to the moon.
In other words, you'd use the exact same goalpost-moving that you do with the official story. You're discounting evidence that's never been produced.
The Soviets wouldn't even be able to produce pictures of empty landing sites. And even if they did I would have said they took them before the Apollo missions got there.
Obvious to who, exactly? They have everything to gain just from falsely claiming that the landings were a hoax, yet they didn't. They would have even more to gain if they had actual evidence of a hoax.
Obviously the soviet union cannot be trusted.
1. Poisoning the well, affirming the consequent.
Originally posted by FoosM
Yes indeed, as well as move the thread along so that people dont have a chance to read material that is posted.
I mean, who but a guilty person, and/or a person with an agenda, or something to hide, would do such things?
Originally posted by Komodo
just something about it being 212*F on the surface on the light side.. right.. or you failed to take that into account .. and go ahead.. put your film in a oven and turn it up to 212*F .. I'm SURE it will come out as good as it was put in ..
just follow your logic .. right..
Originally posted by PsykoOps
Originally posted by Komodo
just something about it being 212*F on the surface on the light side.. right.. or you failed to take that into account .. and go ahead.. put your film in a oven and turn it up to 212*F .. I'm SURE it will come out as good as it was put in ..
just follow your logic .. right..
Omg. They put the films on the surface of the moon? That's amazing. Has to be some top secret method of filming. I'll have to try this.
Source
Duke donated some flown items, including a lunar map, to Kennesaw State University in Kennesaw, Georgia. He left two items on the Moon, both of which he photographed. The most famous is a plastic-encased photo portrait of his family (NASA Photo AS16-117-18841). The reverse of the photo is signed by Duke's family and bears this message: "This is the family of Astronaut Duke from Planet Earth. Landed on the Moon, April 1972."
Various melting points of different types of plastic:
The melting point of HDPE (High Density Polyethelyne) is about 130 ºC
The melting point of LDPE (Low Density Polyethelyne) is about 110 ºC
The melting point of PET (Polyethylene terphthalate) is about 250—260 ºC
The melting point of PP (Polypropylene) is about 160—170 ºC
The melting point of PS (Polystyrene) is about 70—115 ºC
The melting point of PVC (Polyvinyl Chloride) is about 75—90 ºC
Source(s):
www.goedjn.com...…
Originally posted by Komodo
pretty funny huh.. leaving 'plastic-encased' family photo in case someone might pass by and realize someone has travel this way already.. ........................hmmm.. ok .. puz:
but, so.................after 30 years, in 212*F there shouldn't be any fading or complete burning up of the plastic around it.. if it's not ash by then...
Originally posted by jra
Originally posted by Komodo
pretty funny huh.. leaving 'plastic-encased' family photo in case someone might pass by and realize someone has travel this way already.. ........................hmmm.. ok .. puz:
What's funny or confusing about leaving a personal item on the Moon?
but, so.................after 30 years, in 212*F there shouldn't be any fading or complete burning up of the plastic around it.. if it's not ash by then...
By now the photo would be most likely long gone. However the photo would not have melted right away. It would take time.
Did you read the link supplied to you by MacTheKnife? Do you understand the method of heat transfer and how it would work in a vacuum? And did you also come to realize that your example of putting a photo in an oven, is in no way comparable to leaving a photo on the Lunar surface?