alisonkatecarter: Gravitational TractorIllustration Credit & Copyright: Dan Durda (FIAAA, B612 Foundation)Explanation: How would you change the course of an Earth-threatening asteroid? One possibility - a massive spacecraft that uses gravity as a
tags: Platonic Sleepover Eventual Penetration,
from: http://platonic-sleepover.tumblr.com/post/43655910669
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