This+is+an+artist+rendering+of+a+hypothetical+Dyson+sphere.

photo by ビッグアップジャパン, taken on March 15, 2016, Some rights reserved, (license link) http://bit.ly/OJZNiI, (original link to work) http://bit.ly/2525ZG6

This is an artist rendering of a hypothetical Dyson sphere.

Astronomers propose alien construction surrounding distant star

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