Columbia subject headings:
Harvard subject headings:
Astronomical instruments--Europe--History--17th century.
Astronomy--History--17th century.
Galilei, Galileo, 1564-1642
Telescopes--Europe--History--17th century.
Princeton subject headings:
Astronomical instruments--Europe--History--17th century.
Astronomy--History--17th century.
Galilei, Galileo, 1564-1642.
Telescopes--Europe--History--17th century.