INGRID SCHWAMBORN

ASTROLABIO

 

 

Aus: Hans Staden: Wahrhaftig Historia (1557)

 

Aus: Portugal-Brazil (Ausstellungskatalog, 1990)

Ingrid Schwamborn

Vorstandsmitglied der
Gesellschaft der Länder Portugiesischer Sprache (GLPS),
in Zusammenarbeit mit dem
Zentrum Portugiesischsprachige Welt (ZPW)
- ein Institut an der Universität zu Köln -

Ingrid Schwamborn bereitet
ein Buch über Brasilien vor,
insbesondere über die "Entdeckung" Brasiliens durch
die Portugiesen (1500)

Arbeitstitel:
Mit dem Astrolabio zu den Sternen

  Portuguese Astrolabe, 1555.

The nautical astrolabe served to measure
the altitude of celestial bodies,
mainly the North Star and the sun.
After taking a sighting,
navigators would apply a correction factor
(for the North Star)
or consult a table similar to that of Abraham Zacuto´s Perpetual Almanac
(for a sunsight) to calculate their latitude.
During the Age of Discoveries,
the other necessary measurement
– longitude – was calculated by dead reckoning.

With the expansion of underwater archaeology
in recent years,
many astrolabes have been found in wrecks of vessels
that sank in the 16th and 17th centuries.
There are now over five dozen astrolabes known,
about half of which are of Portuguese origin.
(Wilcomb E. Washburn)
Dundee Art Galleries and Museums

 

E-Mail: Info@astrolabio.de