>>Colder than the cosmic background radiation!
>>
>>
http://europe.cnn.com/2003/TECH/space/02/21/hubble.cold/>
>So something that cold still radiates light and energy even though their atoms are barely moving? It gets weirder and weirder.
Yes, it seems that almost any object will radiate energy. The power radiated is more or less proportional to the fourth power of the temperature, if I remember correctly. Now, compare the gas in this article (temperature: ca. 1 K) with your surroundings (ca. 300 K)... That makes for a very low radiation per unit area (also, the gas probably has less density than a typical "vacuum" here on Earth).
Hilmar.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
