Humans have learned a great deal about the laws that govern the physical heavens, but most scientists will readily admit that there is much yet to be learned.
Inimesed on ilmaruumis kehtivate seaduste kohta märkimisväärselt palju teada saanud, aga ometi möönab enamik teadlasi varmalt, et palju on ka seda, mida nad veel ei tea.