EdmundHalleywasanEnglishscientistwholivedover200yearsag...
問題詳情：EdmundHalleywasanEnglishscientistwholivedover200yearsago.Hestudiedthe1111]observationsofcomets(彗星)whichotherscientistshadmade.Theorbit（軌道）ofoneparticularcometwasaverydifficultmathematicalpro...