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Originally posted by DJW001
reply to post by InterdimensionalWarrior
The reason the Earth doesn't heat up to the same temperature as a spacecraft in near Earth interplanetary space is because it has an atmosphere and geomagnetic field. A large percentage of the Suns radiation is absorbed 100's of miles up in the outer layers of the atmosphere , a large percentage of it is blocked by the geomagnetic field, and the Earth has relatively highly reflective surface or albedo due to cloud cover and the oceans. There is also the effect of evaporation of water which has the most dramatic cooling effect.
"Really? Absorbed? Are you saying that the temperature of the Earth's atmosphere is 250 Degrees?"
Some of the less dense areas are at a much higher temperature than that,
" And what does the electromagnetic field have to do with anything?"
It blocks particle radiation , which is a significant percentage of energy coming from the sun.
"It does not reflect infrared radiation."
No it doesn't, but the fact that the Earth is covered over 75% by water and the heat of fusion of evaporation is so high, infra red is mitigated by this well understood phenomenon. Spray yourself with a hose with HOT water on a HiT day and see what the effect is.
" You are now claiming that a high albedo, that is, reflectivity can decrease the absorption of heat"
I don't recall ever denying it.
." Does that not undercut your argument that the spacecraft being made of highly polished material would not serve to keep the temperature down?"
It would keep it down some, but have little effect with aluminum in the solar radiation enviroment, which is a wide spectrum of electromagnetic and particle radiation.
"After all, *polished aluminum has an albedo of nearly 1*! Now, I ask you, why are Earth's poles so cold? Why do we have seasons?"
For visible light and we have seasons because the earths axis is tilted. The poles are cold because they receive less direct sunlight
Originally posted by DJW001
reply to post by InterdimensionalWarrior
The reason the Earth doesn't heat up to the same temperature as a spacecraft in near Earth interplanetary space is because it has an atmosphere and geomagnetic field. A large percentage of the Suns radiation is absorbed 100's of miles up in the outer layers of the atmosphere , a large percentage of it is blocked by the geomagnetic field, and the Earth has relatively highly reflective surface or albedo due to cloud cover and the oceans. There is also the effect of evaporation of water which has the most dramatic cooling effect.
Really? Absorbed? Are you saying that the temperature of the Earth's atmosphere is 250 Degrees? And what does the electromagnetic field have to do with anything? It does not reflect infrared radiation. You are now claiming that a high albedo, that is, reflectivity can decrease the absorption of heat. Does that not undercut your argument that the spacecraft being made of highly polished material would not serve to keep the temperature down? After all, polished aluminum has an albedo of nearly 1! Now, I ask you, why are Earth's poles so cold? Why do we have seasons?
Originally posted by InterdimensionalWarrior
Originally posted by DenyObfuscation
reply to post by blocula
Bloc, are you even aware that the guy you're defending called you an idiot? Just curious.
I don't recall this, perhaps You can direct us to the post
Or perhaps not
So far I have learned in this thread that spacecraft will freeze and turn to dust because they overheat from solar radiation. Love it.
Don't even try it. What one idiot says has nothing to do with the validity of what i said.
Originally posted by blocula
Is this the mccarthy era? a modern day witch hunt? Needlessly searching through someones internet past,trying to dig up any falsely professed dirt,to try and undermine their intelligent reponses and distract as many people as possible away from the truths those responses shine light upon?
Originally posted by ColAngus
Originally posted by InterdimensionalWarrior
Deep space probes are a crock and I can prove it using the scientific method.
Do we need to set up an appointment to get this? How about now? Yeah, pretty sure it's not going to happen.
BTW, I can see from googling your posts over at GLP why you've moved on over here. It's only a matter of time before the fact that you're merely a teenager trolling conspiracy sites becomes common knowledge around here as well.edit on 1-4-2012 by blocula because: (no reason given)
Originally posted by Gibborium
"InterdimensionalWarrior, you have just contradicted yourself. First you claim that reflection was not enough to keep a space capsule/satalite from heating up."
Yep, that's what I said, when we are talking about a wide spectrum of unmitigated solar radiation striking a metal object. .
" Now you say that the earth's albido is reflective enough to maintain a temperature difference. "
Yes, i said that as well. It makes a difference in the amount of solar energy absorbed. But I also mentioned SEVERAL OTHER factors involved which you totally ignored. .
"Here is another question for you. Why are the higher elevations of the earth so much colder than the lower levels?"
Because of the lower pressure, that's the simple answer .
Altitude
Air Pressure
Sea level
14.7 PSI
10,000 feet
10.2 PSI
20,000 feet
6.4 PSI
30,000 feet
4.3 PSI
40,000 feet
2.7 PSI
50,000 feet
1.6 PSI
"It seems to me, you cannot have your cake (space capsules heat up) and eat it too (the earth can cool itself by reflection and evaporation. Sorry"
It seems to me you need to get at least an 6th grade understanding of science before you attempt to discuss it
Originally posted by Cruelty
Originally posted by blocula
I find it hard to believe that deep space probes,like voyager and pioneer,are able to fly 35,000 mph,through temperatures of -455 below zero fahrenheit,which is just 4 degrees above absolute zero,for over 30 years and never break down,show no mechanically ill effects and they just dont seem to ever freeze up rock solid either...
Originally posted by Cruelty
All objects become brittle and shatter? What about satellites? I kind of find it hard to deny they exist. Considering television, GPS, weather imaging, network comm etc.
Because i dont believe their really up there out in deep space,supposedly well beyond pluto by now.Their just another in a long line of nasa/government psych-ops designed to keep us mesmerized and hypnotized by galaxies,stars,planets and moons,to ensure we keep thinking and looking in the wrong direction,up there in outer space,instead of whats going on around us right here on earth...
As hundreds of billions of our tax dollars are continously and legally extorted from us in ever flowing rivers and streams of lies and deceptions,as the majority of that money,our money,is used by the elites leaders of this world,along with their beautiful people families and friends,enabling them all to live the high life of perpetual wealth and pleasure,while vast underground atom bomb/asteroid proof bunkers are being constructed for them,not us,deep underground...
So NASA/government were doing psyh ops projects a thousand years ago? I dont know if you understand this but the stars, space, planets have been up in the sky before man walked the earth. these imaginary things you
speak of have beenrecorded by man throughout ancient history. Or did the Sumerians and Egyptians, babylonians start NASA?