Space Debris and The Kessler Syndrome: A Possible Future Trapped on Earth: Creon Levit
Long Now: Conversations at The Interval
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How to Prevent Debris Debridation Debrisions
The idea was to use a ground base lazer hooked up to moderate sized telescope. And you can put enough light energy on a piece of debris that is equivalent to about what it would see in the sun. You only impart a few millimeters per second of delta v with each of these engagements, but it turns a few millimeter per second over the course of a few hours or days amounts to a lot of distance and so you can actually avoid collisions this way.
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