> Dyson Spheres obfuscating their contained stars as an explanation for dark matter No - MACHOs have been pretty well ruled out by now. "Several groups have se

> Dyson Spheres obfuscating their contained stars as an explanation for dark matter No - MACHOs have been pretty well ruled out by now. "Several groups have searched for MACHOs by searching for the microlensing amplification of light. These groups have ruled out dark matter being explained by MACHOs with mass in the range 1×10−8 solar masses (0.3 lunar masses) to 100 solar masses" (https://en.wikipedia.org/wiki/Massive_compact_halo_object https://en.wikipedia.org/wiki/Massive_compact_halo_object) > Similarly, the heat would still escape from them. Could that explain the CMB? The CMB comes from everywhere at once, uniformly, all the dark spaces in between stars is glowing. Dyson spheres radiating heat would just look like a bunch of dots glowing in the infrared. I don't see how any number of Dyson spheres radiating heat could produce a continuous, uniform field.