ABSTRACT
TodiscoverParmenides'problemandtounderstandhisenraptured feelingofenlightenment:thisismyproblemhere.
4Aproposedsolutionofmyproblem ..Parmenideswasaphilosopherofnature(inthesenseofNewton'sphiloso-
phianatura/is).Awholeseriesofhighlyimportantastronomicaldiscoveries iscreditedtohim:thattheMorningStarandtheEveningStarareoneand thesame;thattheEarthhastheshapeofasphere(ratherthanofadrumof acolumn,asAnaximanderthought).Aboutequallyimportantishis discoverythatthephasesoftheMoonareduetothechangingwayin whichtheilluminatedhalf-sphereoftheMoonisseenfromtheEarth.5
