Astronomers may have found giant alien 'megastructures' orbiting star near the Milky

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By the way, I thought of JWST sun shield. At 1 a.u. the sun-facing side is at 85C and opposite one is at -233 C.

So I would imagine a swarm of billions similarly shielded habitats around this star...

P.S. Also some of excess radiation is radiated out of the sides. So, such a shield would appear cold face-on and warm when faced edge-on. But the edge area is rather small compared to face, so we might not see the warmer edges unless chance alighnment happens

P.P.S Also the sun-faced sides can be actively cooled or used as thermal engines with low-temp working fluid.