What does it mean to hide a star? Would it not be 'visible' by having gravity?
That explains dark matter — vast alien civilisations that leak nothing but gravity. And the microwave background.
No it doesn't. Microwave background intensity is uncorrelated with imputed dark matter density in a given direction.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
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