Columbia subject headings:
Astronomical observatories.
Brahe, Tycho, 1546-1601.
Hven (Island)
Harvard subject headings:
Astronomical observatories
Brahe, Tycho, 1546-1601.
Hven (Island)
Princeton subject headings:
Astronomical observatories.
Brahe, Tycho, 1546-1601.
Hven (Island)