LOUNGE all new asksnapzu ideasforsnapzu newtribes interesting pics videos funny technology science technews gaming health history worldnews business web research entertainment food living internet socialmedia mobile space sports photography nature animals movies culture travel television finance music celebrities gadgets environment usa crime politics law money justice psychology security cars wtf art google books lifetips bigbrother women apple kids recipes whoa military privacy education facebook medicine computing wildlife design war drugs middleeast diet toplists economy fail violence humor africa microsoft parenting dogs canada neuroscience architecture religion advertising infographics sex journalism disaster software aviation relationships energy booze life japan ukraine newmovies nsa cannabis name Name of the tribe humanrights nasa cute weather gifs discoveries cops futurism football earth dataviz pets guns entrepreneurship fitness android extremeweather fashion insects india northamerica
  • leweb

    “It won’t melt because empty space has a very low conductivity”.

    Sure, it won’t heat up by conduction. What kind of an explanation is this?

    • sashinator


      • leweb

        Useless. Heat in space is transferred by radiation, not conduction. If the argument were correct, all the planets would be frozen.

        • AdelleChattre (edited 8 months ago)

          Only heat flux radiation matters to the heat shield. The shield is a black-body radiator, as reflective and emissive as possible, shading as much of the craft as possible. The shield is connected to the craft by struts with as little conductivity as possible, the gap allowing the back side of the shield to radiate away from the craft. Only conduction matters on the craft, which is liquid cooled, and is as actually as conductive as possible to protect the instruments.