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Originally posted by Astronomer68
The maximum temperature of the surface of the moon at noon on a typical lunar day is 395 degrees Kelvin or 251.6 degrees farenheight (by actual measurement) and the minimum temperature reached at night is 95 degrees Kelvin or minus 288.4 degrees farenheight (by actual measurement). One meter below the surface of the Moon the temperature remains at a constant 210 degrees Kelvin or minus 81.4 degrees farenheight (by actual measurement). As you can see from the above information, heat convection does happen, it is just a slow process. Heat radiation also happens.
[edit on 17-10-2005 by Astronomer68]
Originally posted by resistance
Howard. I still don't have my answer. You said:
OK. Lets go over this carefully. There are three ways for an object on earth to dissipate heat.
I'm not concerned with how earth dissipates heat; I want to know about the moon. They are two different places with two entirely different set of circumstances.
Originally posted by resistance
For example, here on Planet Earth I have an air conditioner, and it works because there is an atmosphere to throw the heat out into. If there were no atmosphere, the air conditioner would not work.
Originally posted by resistance
Ergo, since the moon has no atmosphere, where did the astroNOTs send the heat from their "cooling packs."
Originally posted by resistance
And furthermore, if the moon stays in the sun for two weeks (which it does because it does not turn around once a day like the earth does) and if there is no atmosphere, seems to me there are places where the moon gets quite sizzling hot.
Originally posted by resistance
I'm willing to see the light here if somebody will show it to me. I'm just stuck on this idea of the moon being really, really hot in places. I assume you are considering the fact that a moon's day is 28 of ours, so any part of the moon is in the sun's rays for at least two weeks. And with a vacuum that means the only way the moon has to cool itself is a small amount of radiation and by the heat spreading outward throughout the surrounding moon surface.
Originally posted by resistance
how can you be so sure the surface gets no hotter than the rays hitting it?
Originally posted by Wind
Hey Resistance
have you watched the video "a funny thing happened o nthe way to the moon" that you linked once in this thread? If so, what was the most convincing thing?
thnx
I'm not talking about amplifying the energy. I'm talking about storing it. I wonder just how hot certain parts of the moon are able to get in that constant sun with no atmosphere to diffuse any of the heat, and the vacuum to lock it all in. (A vacuum is a perfect insulator) And I want to know a bit more about those cooling packs the astroNOTs were wearing. Something really hokey about those things. I don't see how they could keep them cool. I don't even see how they could keep them pressurized properly. They are the hokiest things I've ever seen, about as hokey as their plastic model spaceships they have in their hands for the astroNOTs photo gallery on the NASA website.
Energy can only be converted, not amplified in some way I believe, I think it's one of the fundamental rules of standard physics.
Originally posted by resistance
I'm not talking about amplifying the energy. I'm talking about storing it. I wonder just how hot certain parts of the moon are able to get in that constant sun with no atmosphere to diffuse any of the heat, and the vacuum to lock it all in. (A vacuum is a perfect insulator) And I want to know a bit more about those cooling packs the astroNOTs were wearing. Something really hokey about those things. I don't see how they could keep them cool. I don't even see how they could keep them pressurized properly. They are the hokiest things I've ever seen, about as hokey as their plastic model spaceships they have in their hands for the astroNOTs photo gallery on the NASA website.
The Apollo space suits were the first to use liquid cooling garments with a separate ventilation garment. The cooling and ventilation system was drastically improved because the astronauts would be doing a great amount of physical activity exploring the moon therefore producing more body heat and perspiration. The astronaut would first dawn the liquid cooling garment, which was long underwear with poly-vinyl tubing sewn in it. This water was cooled in the PLSS and returned to the tubes to cool the astronaut. The ventilation garment was the inner most layer of the pressure garment. This ventilation garment used nylon fabric ducts to circulate the air inside the suit in order to remove carbon dioxide as well as perspiration. This system is very close to the current system in its design because they both use the PLSS to provide cool water and ventilation and their actual construction is very similar. These same Apollo suits were again used in the Apollo-Soyuz missions but relied on an umbilical tether to the spacecraft for air and water. The case was the same for the Skylab missions as well. ILC Dover manufactured and designed both of the suits. ILC Dover manufactures LCVG's for the current space shuttle suit.
ssoar.org...
Originally posted by resistance
Originally posted by Wind
Hey Resistance
have you watched the video "a funny thing happened o nthe way to the moon" that you linked once in this thread? If so, what was the most convincing thing?
thnx
Hi, Wind. Where have you been?
The most convincing thing I saw on the video was the press conference with the astroNOTs. I know guilty people when I see them.
Also Buzz Aldrin's lame excuses to Bart were pretty hilarious. These guys sure don't look or act like heros to me -- but rather phony balony astroNOTs.
What was most convincing to you?
Originally posted by AgentSmith
Are you actually interested in the subject Res, or are you one of the people that likes living in laalaa land and ignores anything that doesn't go along with your thoughts?
For someone that seems to so strongly believe that they didn't go, you actually demonstrate very little knowledge on the whole subject, I'm curious how you came about your conclusions when you obviously do not understand any aspect of physics, you don't understand space travel and you seem to specifically know little about the moon landings.
It's easy to repeat like a parrot what you read or hear, but do you actually understand what you're talking about (that was a rhetorical question ), or are you one of these guys that believes everything you read or hear, especially when it's 'against the system'?
It's increasingly tiresome hearing people prat on about something they think they know about when they have no knowledge of even the basics and the apparant inability or willingness to learn. How the hell someone can keep arguing a point when they are shown to be wrong is beyond me.. And I'm not talking about the event as a whole, I mean each individual 'flaw' that people try and point out that is easily and quickly proven to be an incorrect assumption.
[edit on 19-10-2005 by AgentSmith]
Originally posted by Halfofone
Res, You continue to talk about heat build-up and still say that a vacuum is a perfect insulator, (which it is in an atmosphere).
If it is as good an insulator as you say it is then how the hell does ANYTHING get heated by the sun?
Find the answer and you might just understand what I and others have been trying to tell you.
250 degrees is the point at which the amount of radiative heat recived from the sun is equal to the radiative heat given off because of the high temperature of the surface. You seemt o have a counter productive opinion. You think that the sun can give off heat in a vacuum but other objects cannot. see the problem with that?
Originally posted by resistance
Halfo -- The sun gives off radiative heat and so does the moon (reflected heat from the sun). However, the moon also heats up. The vacuum which is the atmosphere around the moon keeps much of the heat that's not radiated out stored up in the surface.
The surface heats spreads out throughout the surface of the moon. I'm wanting to know the maximum temperature PARTS of the moon get to be, not the average temperature of the whole moon or the average temperature of half of the moon, whatever. Length of time in the sun is a factor that has to be considered in this equation, along with distance from the sun and atmosphere.
Also, as I said, why are the cool packs of astroNOTs on the shuttle hooked to the mother ship, but the astroNOTs could run around the moon for hours on end with no hookup to their cool packs? Hmmm?
Backdropped against clouds 130 nautical miles below, astronaut Mark C. Lee floats freely without tethers as he tests the new Simplified Aid for EVA Rescue (SAFER) system.
grin.hq.nasa.gov...
As I say, my flagstones heat up really hot just from being in the sun for a few hours, and there is no vacuum here on Earth to seal in the heat as there is on the moon. Most of the heat from the flagstones is dissipated into the atomosphere, not from radiating the light out. Same with the moon. Most of the heat does not get radiated away.
"The surface temperature was about 140 degrees on the tarmac."
www.washingtontechnology.com...
Wind, I've not seen Bart Sibrel's entire film. I'm thinking I may order it along with Ralph Rene's stuff.