NEW EVIDENCE suggests a "ninth planet," this time for sure!


See also Cruel things your ex has said about you — or astronomers describing the new ‘Planet Nine’?



I don’t get it.




Of course, to really understand that metric, you’'ll need to understand A QUANTITATIVE CRITERION FOR DEFINING PLANETS.

Where does Planet 9 fall in terms of Stern-Levison’s Λ of Soter’s µ?

#7 looked like it might have been interesting.


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