Columbia subject headings:
Harvard subject headings:
Astronomers--Germany--Biography
Astronomy--Early works to 1800
Astronomy--Early works to 1800--History and criticism.
Kepler, Johannes, 1571-1630--Knowledge--Astronomy.
Kepler, Johannes, 1571-1630.
Optics--Early works to 1800--History and criticism.
Orbits.
Planetary theory--Early works to 1800--History and criticism.
Planetary theory--Early works to 1800.
Science--Philosophy--Early works to 1800--History and criticism.
Science--Philosophy--Early works to 1800.
Princeton subject headings:
Astronomy--Early works to 1800--History and criticism.
Kepler, Johannes, 1571-1630.
Optics--Early works to 1800--History and criticism.
Planetary theory--Early works to 1800--History and criticism.
Science--Philosophy--Early works to 1800--History and criticism.