Recent content by Prof Null

Imagine that you are in a spacecraft and you then open a hatch, of a type like the door of a Gemini capsule (it hinges outward). Does the action of the hatch opening outward then hitting a stop impart force to the ship? Note that this is in deep space, that is, ignoring outside gravity fields...

Thankyou AlexLAV, you have been specially helpful. Four layers of gold plate with vacuum in between would be fine - there would be more losses because of the door seams but that must be accepted: I expected that some energy would need to be added to stop things freezing up, this looks more like...

I'm new here. I am working on a fictional space commerce system using containers to transport things between planets. The container size is 4x4x8 meters and most often it would be colored but call it grey for the purpose of the question. I don't know what you would make it from, I suppose...