ChristianKl comments on Open thread, Oct. 12 - Oct. 18, 2015 - Less Wrong
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There might be an alien civilization building stuff in its solar system.
If this turns out to be aliens rather than a low-probability astronomical event, does it imply that getting out into space is a lot harder than it sounds?
How can they get a mess of objects whirling around a star without getting into space?
I probably should have used more exact language. The Fermi Paradox isn't mostly about species puttering around in their home solar system-- it's about filling a galaxy.