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How worried should we all be?

This is real-time data of close approaches between stuff in orbit (credit to Dr. Moriba Jah): http://astriacss03.tacc.utexas.edu/ui/min.html

1-2km close approaches every few minutes doesn't seem too bad, but remember everything in orbit travels at *several km per second* and most of these tracked objects don't have the ability to maneuver.

It's pretty bad, folks.