Moonmoon

Like a goddamned fairy tale.

I learned recently that the moon of a moon is called, informally, a moonmoon. Chris read this to me on the phone from the Reddit thread Today I Learned, as he often does before we go to sleep. The timing was fitting because I had just gotten back from Dutchess and Ulster Counties,  where I was both giving a lecture at Vassar (casual!) in Poughkeepsie an…