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Originally posted by leejones
about astranorts doing odd jobs on the space staion, and in the report thay showed the part off the space staion it was blowing around like a ballon ? not by the engines.how come we never see any stars in video reports and we onley see parts where the earth is and not a 360 turn ? i smell a news cover up is there air in space
[edit on 4-8-2006 by leejones]
Finally, you are right, there is air in space. But NASA has a multi-billion dollar contract with a space suit manufacturer who altered key evidence to show there was no air in space, thus the space suits were needed for breathing.
Originally posted by MozartSeason
Finally, you are right, there is air in space. But NASA has a multi-billion dollar contract with a space suit manufacturer who altered key evidence to show there was no air in space, thus the space suits were needed for breathing.
I'm sorry, are you saying that there's breathable air in the vaccuum of space?
Please, elaborate an educate.
Originally posted by backtoreality
Originally posted by leejones
about astranorts doing odd jobs on the space staion, and in the report thay showed the part off the space staion it was blowing around like a ballon ? not by the engines.how come we never see any stars in video reports and we onley see parts where the earth is and not a 360 turn ? i smell a news cover up is there air in space
[edit on 4-8-2006 by leejones]
They do have engines on the space station. They collect natural gas from the astronauts and then convert it into a usable fuel. After 14 years, they would have enough to go to Mars.
You never seen any stars in space because you need special glasses. Because it is so dark, glasses similiar to night vision are necessary in order to see anything except the sun or the moon or the earth. They are also really expensive, so only 1 pair get taken aboard the space shuttle.
The earth in fact is not 360 degrees. It is exactly 248 degrees. This is why the entire earth is never shown in any photograph. Real estate agents have been selling land that does not exist for decades, but their money fuels the global media, which is why you never hear about it on TV.
Finally, you are right, there is air in space. But NASA has a multi-billion dollar contract with a space suit manufacturer who altered key evidence to show there was no air in space, thus the space suits were needed for breathing.
Originally posted by cmdrkeenkid
See, I thought you were just joking around before... But maybe I was wrong?
Originally posted by Langolier
Originally posted by cmdrkeenkid
See, I thought you were just joking around before... But maybe I was wrong?
Scary, isn't it? On this website you just can't know for sure.
-------------
I'll humor the OP though. If there was breathable air in space you would still want to heat it up before inhaling it. If you need proof of this, then stowaway in the landing gear bay of a 747 and see how cold you get.
Originally posted by backtoreality
Why do you think they mention the cabin is "pressurized"?
Pressurized air for the cabin comes from the compressor stages in the aircraft's jet engines. Moving through the compressor, the outside air gets very hot as it becomes pressurized. The portion drawn off for the passenger cabin is first cooled by heat exchangers in the engine struts and then, after flowing through ducting in the wing, is further cooled by the main air conditioning units under the floor of the cabin.
The cooled air then flows to a chamber where it is mixed with an approximately equal amount of highly filtered air from the passenger cabin. The combined outside and filtered air is ducted to the cabin and distributed through overhead outlets.
Inside the cabin, the air flows in a circular pattern and exits through floor grilles on either side of the cabin or, on some airplanes, through overhead intakes. The exiting air goes below the cabin floor into the lower lobe of the fuselage. The airflow is continuous and quickly dilutes odors while also maintaining a comfortable cabin temperature.
About half of the air exiting the cabin is immediately exhausted from the airplane through an outflow valve in the lower lobe, which also controls the cabin pressure. The other half is drawn by fans through special filters under the cabin floor, and then is mixed with the outside air coming in from the engine compressors.
These high efficiency filters are similar to those used to keep the air clean in hospitals. Such filters are very effective at trapping microscopic particles as small as bacteria and viruses. It is estimated that between 94 and 99.9 percent of the airborne microbes reaching these filters are captured.
Originally posted by cmdrkeenkid
Cabin Pressurization
Get educated!
Originally posted by backtoreality
Imagine this same concept, but at 600mph--this is what is know as "cabin pressurization". It is a direct vent to the outside; no pumps or moving parts needed.
If you think about it, it should be obvious that the lower you are in the atmosphere, the more air you have above you, and therefore the higher the air pressure. Indeed, the change in pressure with height is so regular that meteorologists use pressure as a vertical coordinate instead of height. So instead of seeing weather maps at, say, 1.5 km, you would see a map at 850 mb, which is approximately 1.5 km above sea level.
To convert from pressure to height, just remember two rules:
Sea level pressure is about 1000 mb;
For every 5.5 km increase in height, the air pressure decreases by a factor of two.
Air pressure decreases with height because as you move up through the
atmosphere, there is less and less air above you pushing down. Because
pressure decreases with height, air expands as it rises. When the air
expands, it uses up energy by pushing the surrounding air outward. The
molecules in the air lose energy and slow down. So air cools as it rises and
warms as it sinks. Rising air cools at a rate of 5.5 degrees F for every 1000
feet.