Sky temperature profiles and black body radiation

AI Thread Summary
The discussion centers on the possibility of achieving a positive balance of black body radiation (BBR) in outer space, excluding the sun. The user proposes a concept involving a half convex structure with an active polarizer that selectively allows radiation below a certain temperature to pass through. This raises questions about the feasibility of manipulating thermal radiation in a vacuum environment. The inquiry seeks insights into the physics of BBR in outer space compared to Earth. Overall, the conversation explores innovative ideas for managing thermal dynamics beyond our planet.
lostminty
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I want to know, excluding the sun with an appropriate boundary, whether it is possible for the balance of bbr to be positive for outerspace rather than on earth? I am thinking of a half convex with an active polariser across-the outer surface which allows through most radiation below the temperature you desire.
 
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