外太空凍唔凍?

Actually this way of thinking is correct. It is almost vaccum in space, so the only way for heat transfer is through radiation. Your body temperate is only a few hundred K so, yes, you will still radiate and loss energy -- but very slowly. So you don't really feel cold at all.

Of course, when you happened to touch another piece of material in space which is close to 0K, and it has high conductivity -- that way then you will feel cold. Conductivity is another important factor. For example you will much colder when touch a piece of metal at 0C than touching a piece of wood at the same temperature, because conductivity of metal is higher.

So all it comes down to whether you in direct contact with something or not. You don't "feel cold" unless you touch something of a large enough quantity at lower temperature than you do.

著住保溫既野，可以保存溫度，這只是在大氣層內才正確。在太空，衹是理論上是絕對0度K，因冇任何物質存在。事實是在最寒冷之位置(太陽系與太陽系之間)，都有微量氣體塵埃，而溫度都有幾十度K，即代表份子運動(由幅射放出)，都會放出熱能。太空衣與太空人，都是由份子組成，當走到太空中，都會由於幅射而失去熱能，所謂保溫太空衣，都只是減緩熱能散失。空氣傳熱，只是熱傳道之其中一種方式。

外太空凍，呢個想法有漏洞

it is cold