Columbia subject headings:
Brahe, Tycho, 1546-1601.
Bruno, Giordano, 1548-1600.
Cosmology.
Reimers Ursus, Nicholas, 1551-1600.
Röslin, Helisaeus, 1545-1616.
Harvard subject headings:
Cosmology--History--16th century.
Princeton subject headings:
Cosmology.