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Re:Alone in a Crowded Milky Way by hoorayimhelping on Wednesday January 01, 2020 @04:30PM (#21930807)
>What would our telescopes see? It seems like we would most likely see exactly what we see today.

We'd see more red than we do - more heat and less light. Civilization produces heat. Advanced civilizations would presumably convert starlight to energy and produce waste heat.

Re:Alone in a Crowded Milky Way by ncmncm on Wednesday January 01, 2020 @11:58PM (#21933145)
An advanced civilization, by definition, would not be dependent on starlight.

Or planetary surfaces.

Re:Alone in a Crowded Milky Way by hnews_account_1 on Thursday January 02, 2020 @02:25PM (#21938761)
Where else could they possibly get energy from? Planets can be replaced by orbitals, but there's no way to replace the sun.
Re:Alone in a Crowded Milky Way by ncmncm on Thursday January 02, 2020 @08:25PM (#21942052)
Even extreme primitives have magnetic-confinement fusion.
Re:Alone in a Crowded Milky Way by hnews_account_1 on Friday January 03, 2020 @11:24AM (#21947291)
Ah ok. That makes sense. In that world, they can even use miniature black holes once they can stabilise and capture them in a field, to generate energy.
Re:Alone in a Crowded Milky Way by pavel_lishin on Wednesday January 01, 2020 @05:06PM (#21931063)
Who's to say that the amount of red we're seeing now isn't exactly what you're describing? Maybe if we lived in a barren galaxy, we'd see a lot more _blue_, as stars shone unencumbered by matrioshka brains.