I would like to explain it to you but I don’t think I can dumb it down to a level you could understand. Suffice to say the issue was not in keeping it warm enough but in keeping it cool enough, again you won’t be able to understand that electronics produced heat, the astronauts produced heat, the sun warmed one side of the capsule most of the time, the vacuum of space is actually a good insulator. No, I can see all this is beyond you, perhaps you could do some objective research, ha, well at least this is the joke section.