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How could the astronauts survive in the heat of the Moon's day? Objects that are heated cannot be cooled by space.
This is true, to a point, however spacesuits can radiate heat. All objects above absolute zero radiate heat; therefore some of the heat energy received from the Sun is radiated back into space as infrared rays. Also, much of the Sun's radiant energy can be reflected away. The astronaut's spacesuits were white because this color reflects the most radiation, thereby minimizing the amount absorbed. Finally, the spacesuits where equipped with a cooling system that utilized water as a medium to carry away excess heat. Water sprayed into a vacuum experiences a very rapid drop in pressure and, consequently, temperature. Hence, when a small amount of water was sprayed onto a cooling element on the rear of the spacesuit, its temperature dropped so much that it would immediately freeze onto the element. The cooling water of the spacesuit was then pumped through this element. The heat of the cooling water melted the ice, which then rapidly boiled off and carried into space the unwanted heat.
Originally posted by SiberianTiger
Radiation of all types will travel through a vacuum but will not affect the vacuum. Radiant heat from the sun travels through the vacuum of space but does not "warm" space. In fact the radiant heat of the sun has no affect whatsoever until it strikes matter. Molecular movement will increase in direct proportion to the radiant energy which is absorbed by matter. The time it takes to heat matter exposed to direct sunlight in space is determined by its color, its elemental properties, its distance from the sun, and its rate of absorption of radiant heat energy. Space is NOT hot. Space is NOT cold.
Objects which are heated cannot be cooled by space. In order for an object to cool it must first be removed from direct sunlight. Objects which are in the shadow of another object will eventually cool but not because space is "cold". Space is not cold. Hot and cold do not exist in the vacuum of space. Objects cool because the laws of motion dictate that the molecules of the object will slow down due to the resistance resulting from striking other molecules until eventually all motion will stop provided the object is sheltered from the direct and/or indirect radiation of the sun and that there is no other source of heat. Since the vacuum of space is the perfect insulator objects take a very long time to cool even when removed from all sources of heat, radiated or otherwise.
Originally posted by SiberianTiger
You sound childish and you didn't get what I'm saying, going to the moon was never tested o.k. when they supposedly went that was the first time anything (let alone humans) supposedly left earths orbit and went out of the V.A.B. no human being who knew what space was really like would have tried such a thing IF they knew that no other humans or tests we're ever done on the moon, If you still don't understand what I'm saying I explain it like this ALL three astroNUTS Aldrine, Glenn, Armstrong if they knew basic knowledge of space VanAllen Belt would have asked::, NASA 1. "Has any other humans erer left earths orbit and V.A.B.?" NASA's answer= "NO" 2. AstroNUTS next question= "Have you (NASA) even tested this by trying to send animals outside the VAB and to the moon?" NASA's answer= "NO". AstroNUTS next question = Are you ( NASA) telling us we are the first to ever do this with out any other tests ever done NASA's answer:: YES AstroNUT'S real REPLY if they found this out:: NO WAY we ain't goin NO WAY. Be real Howard would YOU try it knowing no animal human has even bein tested ? Your answer would be NO, I know it. SO are you (Howard) going to now tell us that NASA didn't bother iforming th AstroNUTS Aldrine, Glenn, Armstrong and thats how NASA really go them to go along this most dangerous mission hahahaahah
Originally posted by SiberianTiger
SO are you (Howard) going to now tell us that NASA didn't bother informing the Aldrine, Glenn, Armstrong that this has NEVER been tested before ,and thats how NASA really go them to go along with the mission? I can't wait to hear your answer on this one. hahahaahah
[edit on 10-2-2005 by SiberianTiger]