What is the main purpose of Webb's Five-Layer Sunshield, as shown in the diagram?

Webb’s five-layer sunshield keeps the telescope’s instruments cold by blocking sunlight and directing heat away from the telescope’s cold side. It does not store heat or use sunlight to generate power; some heat is absorbed by the layers and radiated away into space. Therefore, the main purpose is to block and redirect heat away from the telescope’s cold side.

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