Columbia subject headings:
Astronomy--History.
Copernicus, Nicolaus, 1473-1543.
Einstein, Albert, 1879-1955.
Relativity (Physics)
Harvard subject headings:
Astronomy--History
Copernicus, Nicolaus, 1473-1543.
Einstein, Albert, 1879-1955
Relativity (Physics)
Princeton subject headings:
Relativity (Physics)