Artist's concept of how an extraterrestrial civilization ?

This image suggests how an extraterrestrial civilization on an earth-like planet might reveal itself via artificial light sources, in this case brightly lit cities that follow the contours of the ocean coasts. Perhaps some day there will be a telescope powerful enough to resolve such evidence for extrasolar intelligence

Astrobiology Astrogeology Bioastronomy Colonization Exobiology Exogeology Exopaleontology Exoplanet Extrasolar Extraterrestrial Planetary Sphere Universe

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