Columbia subject headings:
Astronomy--Early works to 1800.
Copernicus, Nicolaus, 1473-1543.
Galilei, Galileo, 1564-1642.
Harvard subject headings:
Astronomy--Early works to 1800
Copernicus, Nicolaus, 1473-1543.
Galilei, Galileo, 1564-1642
Solar system--Early works to 1800.
Princeton subject headings: