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FogeltheVogel t1_j69weaz wrote

A few planets is a tiny fraction of the mass of a start system. How exactly is that an example of a galaxy sized structure needing multiple galaxies worth of material?


ManyThingsLittleTime t1_j6afcrz wrote

It is an example to demonstrate how much mass is needed to accomplish even a small scale version of what their talking about. It's an analogy.