Astrolabes, quadrants, and calculating devices - Encyclopaedia of Islam, THREE
General Material Designation
[Article]
First Statement of Responsibility
King, David A.
.PUBLICATION, DISTRIBUTION, ETC
Place of Publication, Distribution, etc.
Leiden
Name of Publisher, Distributor, etc.
Brill
GENERAL NOTES
Text of Note
(2,946 words)
SUMMARY OR ABSTRACT
Text of Note
Astrolabe (Ar. asṭurlāb or aṣṭurlāb ), is a Greek invention of late antiquity, which Muslims first encountered in the second/eighth century in Ḥarrān. The utility of the instrument-a mirror of the universe that can be held in the hand-immediately inspired them to make astrolabes of their own, with the earliest surviving Islamic astrolabe dating from late second/eighth-century Baghdad. The instrument has many uses, especially as an analogue computer and for astronomical timekeeping, as well as for deriving basic information for a horoscope. Muslim astronomers in Baghdad