Kessler and Cour-Palais publish the collision cascade argument

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Two NASA researchers set out, in the Journal of Geophysical Research, the statistical case that collisions between artificial satellites would themselves become the dominant source of new debris, producing a belt of fragments around the Earth. The paper was written when the catalogued population was a small fraction of its present size and no accidental collision between two intact satellites had ever occurred; its argument was entirely prospective, and it took thirty-one years for the collision it described to happen.

A node is not a place. Drawing it on a map would assert something about the world that no stored fact supports.