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originally posted by: MerkabaMeditation
Apollo spacecrafts only had a heat shield for rentering the Earths atmosphere which had absolutely no effect when it came to radiation protection for the Apollo crew or computer systems.
More specifically an ablative heat shield that consists of a layer of plastic resin; the outer surface of which is heated to a gas which carries the heat away by convection. Such shields were used on the Mercury, Gemini and Apollo spacecraft.
-MM
originally posted by: Kandinsky
a reply to: MerkabaMeditation
We must solve these challenges before we send people through this region of Space.
It's an accurate statement of fact and doesn't negate the other fact that people have been sent through that region of space. VAB radiation is a challenge that's waiting for a more elegant solution than increased shielding which demands increased payloads and higher costs.
Just getting a payload into orbit is a constant challenge and fraught with failures even though we continue to do so.
Challenge isn't a synonym for 'impossible.'
Needless to say this is a very simplistic statement. Yes, there is deadly radiation in the Van Allen belts, but the nature of that radiation was known to the Apollo engineers and they were able to make suitable preparations. The principle danger of the Van Allen belts is high-energy protons, which are not that difficult to shield against. And the Apollo navigators plotted a course through the thinnest parts of the belts and arranged for the spacecraft to pass through them quickly, limiting the exposure.
The Van Allen belts span only about forty degrees of earth's latitude -- twenty degrees above and below the magnetic equator. The diagrams of Apollo's translunar trajectory printed in various press releases are not entirely accurate. They tend to show only a two-dimensional version of the actual trajectory. The actual trajectory was three-dimensional. The highly technical reports of Apollo, accessible to but not generally understood by the public, give the three-dimensional details of the translunar trajectory.
Each mission flew a slightly different trajectory in order to access its landing site, but the orbital inclination of the translunar coast trajectory was always in the neighborhood of 30°. Stated another way, the geometric plane containing the translunar trajectory was inclined to the earth's equator by about 30°. A spacecraft following that trajectory would bypass all but the edges of the Van Allen belts.
This is not to dispute that passage through the Van Allen belts would be dangerous. But NASA conducted a series of experiments designed to investigate the nature of the Van Allen belts, culminating in the repeated traversal of the Southern Atlantic Magnetic Anomaly (an intense, low-hanging patch of Van Allen belt) by the Gemini 10 astronauts.
originally posted by: MerkabaMeditation
All the Apollo astronauts seem to not have been affected by their travel though the Vann Allen Belts 40-45 years later, so why is NASA in 2014 saying "We must solve these challenges before we send people through this region of Space."
Radiation like this can harm the guidance systems, onboard computers, or other electronics on Orion.
No astronaut has been gotten as much as radiation sickness from the Vann Allen Belts according to NASA
The NASA statement makes not sense;
originally posted by: MerkabaMeditation
originally posted by: Kandinsky
a reply to: MerkabaMeditation
We must solve these challenges before we send people through this region of Space.
It's an accurate statement of fact and doesn't negate the other fact that people have been sent through that region of space. VAB radiation is a challenge that's waiting for a more elegant solution than increased shielding which demands increased payloads and higher costs.
Just getting a payload into orbit is a constant challenge and fraught with failures even though we continue to do so.
Challenge isn't a synonym for 'impossible.'
All the Apollo astronauts seem to not have been affected by their travel though the Vann Allen Belts 40-45 years later, so why is NASA in 2014 saying "We must solve these challenges before we send people through this region of Space." No astronaut has been gotten as much as radiation sickness from the Vann Allen Belts according to NASA, but still it somehow is a "challenge" to "send people through this region of Space". The NASA statement makes not sense; if none has been harmed in 40-45 years by the Vann Allen Belts, then why is it a "challenge" to "send people through this region of Space".
-MM
originally posted by: hellobruce
Try actually reading what was said....
Radiation like this can harm the guidance systems, onboard computers, or other electronics on Orion.
No astronaut has been gotten as much as radiation sickness from the Vann Allen Belts according to NASA
So why are you going on about it?
We must solve these challenges before we send people through this region of Space.
originally posted by: OccamsRazor04
a reply to: MerkabaMeditation
When did Astronauts travel to Mars? That is what this is talking about.
We must solve these challenges before we send people through this region of Space.
originally posted by: MerkabaMeditation
originally posted by: OccamsRazor04
a reply to: MerkabaMeditation
When did Astronauts travel to Mars? That is what this is talking about.
As explained in text and in the infographics in my OP; the Vann Allen Belts are located between the Earth and the Moon. Are you saying that we don't have to cross the Vann Allen Belts if we travel to the Moon? Do you know a shortcut, perhaps?
-MM
originally posted by: MerkabaMeditation
originally posted by: hellobruce
Try actually reading what was said....
Radiation like this can harm the guidance systems, onboard computers, or other electronics on Orion.
No astronaut has been gotten as much as radiation sickness from the Vann Allen Belts according to NASA
So why are you going on about it?
As stated in my OP, NASA says in the 2014 video that the problem is sending people through the Van Allen Belts:
We must solve these challenges before we send people through this region of Space.
-MM
originally posted by: OccamsRazor04
a reply to: MerkabaMeditation
No, as I explained, when he said ...
We must solve these challenges before we send people through this region of Space.
... The Van Allen belt is just one of the dangers mentioned. It's not even what he considers the most dangerous one, so why are you focusing on it? It takes the entire statement out of context, perhaps that was your plan?
originally posted by: MerkabaMeditation
originally posted by: OccamsRazor04
a reply to: MerkabaMeditation
No, as I explained, when he said ...
We must solve these challenges before we send people through this region of Space.
... The Van Allen belt is just one of the dangers mentioned. It's not even what he considers the most dangerous one, so why are you focusing on it? It takes the entire statement out of context, perhaps that was your plan?
I'm sure any space mission is frauth with challenges; I'm scrutinizing one of these here by placing it in the context of the Apollo Program, out of which come some surprising logical defaults that contradicts established historical facts.
-MM
Before we can send astronauts into space on Orion, we have to test all of its systems, and there’s only one way to know if we got it right; fly it in space.
Orion has protection, shielding will be put to the test as the vehicle cuts through the waves of radiation. Sensors aboard will record radiation levels for scientists to study.