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Originally posted by SayonaraJupiter
Tomblvd, on to the follow up question - When the Russians launched a turtle to the moon on September 14, 1968, did it directly enhance NASA's scientific understanding of cosmic space radiation on human tissue, prior to the Apollo 8 launch on December 21, 1968?
now I am going to ask you for the citation which shows that, prior to Apollo 8 launch date, NASA scientists reproduced deep space conditions in controlled laboratory experiments and conducted studies of human tissue or live animals in that 'reproduced' environment.
You can't say it was 5 in 12. There were 5 in 27 spacecraft that failed to reach orbit. Only two of the launches where complete failures (with the three craft on those rockets not reaching orbit). The other two craft that failed to reach orbit were on launches where other payload was able to get to the intended orbit.
Originally posted by SayonaraJupiterIt will take some time for me to correlate all this mission information. I look forward to absorbing more radiation data! (horrible radiation joke) But I will stand by my "full of fail" remark since 5 failures in 12 launches (speaking of OV1) equates to a 41 percent fail rate.
Originally posted by nataylor
reply to post by SayonaraJupiter
How's this:
Second Symposium on Protection against Radiations in Space (1964)
It contains a ton of papers, and you can see that the papers reference previous work. And this is just from the second symposium..
And here is a long 1967 report that also cites a ton of previous work:
Radiobiological factors in manned space flight
Originally posted by nataylor
You can't say it was 5 in 12. There were 5 in 27 spacecraft that failed to reach orbit. Only two of the launches where complete failures (with the three craft on those rockets not reaching orbit). The other two craft that failed to reach orbit were on launches where other payload was able to get to the intended orbit.
Originally posted by SayonaraJupiterIt will take some time for me to correlate all this mission information. I look forward to absorbing more radiation data! (horrible radiation joke) But I will stand by my "full of fail" remark since 5 failures in 12 launches (speaking of OV1) equates to a 41 percent fail rate.
Originally posted by Tomblvd
Originally posted by SayonaraJupiter
Tomblvd, on to the follow up question - When the Russians launched a turtle to the moon on September 14, 1968, did it directly enhance NASA's scientific understanding of cosmic space radiation on human tissue, prior to the Apollo 8 launch on December 21, 1968?
Lol, of course not!
The Soviet predisposition of sending living creatures into space was merely a media-driven event. It had little to do with actual science.
Anything NASA wanted to know about radiation, be it in LEO, trans VA belt or csi-lunar space was easily obtained with the recording devices they launched throughout the decades prior to Apollo.
You don't need to send live creatures into an environment to determine if it is dangerous. As a matter of fact it is a bad way to do it, seeing as how different species react to radiation differently.
now I am going to ask you for the citation which shows that, prior to Apollo 8 launch date, NASA scientists reproduced deep space conditions in controlled laboratory experiments and conducted studies of human tissue or live animals in that 'reproduced' environment.
What "deep space conditions" are you talking about? Please be specific.
Scientific method refers to a body of techniques for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge.[1] To be termed scientific, a method of inquiry must be based on gathering observable, empirical and measurable evidence subject to specific principles of reasoning.[2] A scientific method consists of the collection of data through observation and experimentation, and the formulation and testing of hypotheses. - source Wikipedia
You didn't even look at the sources I gave you, did you? Plenty of tissue analysis in there.
Originally posted by SayonaraJupiter
Where are the NASA citations for human tissue/live animal testing conducted outside the VAB's prior to Apollo 8 launch on December 21, 1968? There are none.
Originally posted by nataylor
You didn't even look at the sources I gave you, did you? Plenty of tissue analysis in there.
Originally posted by SayonaraJupiter
Where are the NASA citations for human tissue/live animal testing conducted outside the VAB's prior to Apollo 8 launch on December 21, 1968? There are none.
Originally posted by SayonaraJupiter
Tomblvd, please meet DJW001. I'll let you two have a moment to discuss the "deep space conditions".
DJW001 has said "Sending live animals into the cis-lunar environment was unnecessary;" DJW001 also stated "the data received from electronic probes allowed scientists to reproduce deep space radiation conditions in controlled laboratory experiments."
Tomblvd has agreed with DJW001 here "You don't need to send live creatures into an environment to determine if it is dangerous." Tomblvd also stated "Anything NASA wanted to know about radiation, be it in LEO, trans VA belt or csi-lunar space was easily obtained with the recording devices they launched throughout the decades prior to Apollo."
Where are the NASA citations for human tissue/live animal testing conducted outside the VAB's prior to Apollo 8 launch on December 21, 1968? There are none.
Originally posted by Tomblvd
I'm still waiting for you to tell us what, specifically, "deep space conditions" are. You laugh it off, but it is of extreme importance if we are to tell if you really have any idea what you are talking about when it comes to radiation.
DJW001 wrote (in pertinent part):
Sending live animals into the cis-lunar environment was unnecessary; the data received from electronic probes allowed scientists to reproduce deep space radiation conditions in controlled laboratory experiments. This allowed for more direct observations. The example you cited earlier is an excellent example of the limitations on performing experiments that are monitored remotely by telemetry.
Originally posted by SayonaraJupiter
Originally posted by Tomblvd
I'm still waiting for you to tell us what, specifically, "deep space conditions" are. You laugh it off, but it is of extreme importance if we are to tell if you really have any idea what you are talking about when it comes to radiation.
reply to post by Tomblvd
Like I said you need to speak to DJW001 about his post on page 258 of this thread. Let's review.
DJW001 wrote (in pertinent part):
Sending live animals into the cis-lunar environment was unnecessary; the data received from electronic probes allowed scientists to reproduce deep space radiation conditions in controlled laboratory experiments. This allowed for more direct observations. The example you cited earlier is an excellent example of the limitations on performing experiments that are monitored remotely by telemetry.
Where are the NASA citations for human tissue/live animal testing conducted outside the VAB's prior to Apollo 8 launch on December 21, 1968? There are none.
DJW001 "The radiation argument hinges upon one factor: fear of radiation."
SayonaraJupiter wrote: DJW001 could you please point out to me any successful science missions (US or USSR) doing human tissue or live animal testing which exceeded beyond LEO and beyond the VAB's prior to A8, launch date December 21, 1968? Same question for weed and Tomblvd. It is a yes or no question. If, yes, please cite your sources.
Tomblvd wrote: I want to know what it is about "deep space" that you think is specifically dangerous. You are the one who brought it up, now tell us why.
Originally posted by SayonaraJupiter
What science is better? Theoretical science papers which speculate on Monte Carlo simulations or the science that actually sends a turtle around the moon? Which science is more credible to you?
I want to know what it is about "deep space" that you think is specifically dangerous. You are the one who brought it up, now tell us why.
The Moon, with no atmosphere, is more dangerous than the surface of Mars. Lunar forays will have to be brief unless expensive shielded habitats are built.
Mission planners knew the Apollo astronauts would be at grave risk if a strong solar flare occurred during a mission. The short duration of each trip was a key to creating favorable odds.
"A big solar event during one of those missions could have been catastrophic," said Cary Zeitlin, a radiation expert at the National Space Biomedical Research Institute at Baylor College of Medicine in Houston. "The risk was known. They gambled a bit."
Someone walking on the Moon, even in a fancy space suit, would be good as naked in the face of the Sun's worst fury.
"If one were exposed to the full brunt of a solar event, that could cause acute effects in the very short term," Zeitlin explained in a telephone interview. "Quite severe illness" could result. NASA says the radiation sickness from a solar flare could kill an unprotected astronaut.
Cosmic rays, the other big space-particle worry, come from undetermined galactic sources and pose a greater long-term risk for cancer, cataracts and other illness, Zeitlin said. Cosmic ray particles are more energetic than their solar cousins.
"These are atomic nuclei stripped of electrons," he explained. "They're able to penetrate many centimeters of solid matter."
It might seem, then, that the first human trip to Mars should take place at solar minimum, a 2-3 year stretch every 11 years when sunspots and flares are almost nonexistent.
But there's a catch: "Galactic particle intensity picks up during solar minimum," Zeitlin said. They are higher-energy and more difficult to shield in a space habitat and "impossible to shield completely" on a spaceship.
Originally posted by SayonaraJupiter
Radiation is JW's main argument. Here is a source which supports the same conclusion.
There is no "biggest danger" in setting up a permanent lunar presence or sending people to Mars, says John Charles, an enthusiastic proponent of both ideas and a NASA analyst of the costs and risks of human space flight: "There are several."
Launch, landing and re-entry are perhaps the riskiest moments of any space venture, history shows. But on long missions, what would otherwise be minor threats could become at best serious limitations or at worst deadly disasters.
Basking in the glow of President Bush's call for sending humans back to the Moon as early as 2015 and then eventually to the red planet, Charles, who works at the Johnson Space Center in Houston, offered up his danger list yesterday:
* Lack of a medical facility could turn a mundane injury into a life-threatening situation;
* "Psychosocial" pressure will be high in a small group isolated for months or years;
* Zero or reduced gravity causes bone and muscle loss;
* Dangerous radiation particles are abundant beyond Earth orbit.
"Radiation is a potential show stopper," Charles told SPACE.com, quickly adding that researchers are "getting on top of that" while also learning how to clear the other hurdles.
Total exposure
Any grand leap into the cosmos, as outlined by Bush last week, will start with dangerous baby steps as explorers cautiously venture into the hazardous, radiation-laden space beyond Earth's protective magnetic field. Scientists are still working to characterize the dangers and develop the technologies necessary for safe suits and ships.
This much they know:
Any trip beyond Earth orbit will involve radiation threats not faced by residents of the International Space Station, which sits inside the planet's magnetic field.
A 2-1/2-year trip to Mars, including six months of travel time each way, would expose an astronaut to nearly the lifetime limit of radiation allowed under NASA guidelines.