Changing the Angle of Vision: Astrolabe Dials on Astronomical Clocks
In: Medieval EncountersSearch for other papers by Günther Oestmann in
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Abstract
From the middle of the fourteenth century until the Early Modern period, several monumental astronomical clocks were erected in Europe, and on many of them astrolabe dials were placed. On a group of earlier clocks, “southern astrolabes” (i.e. with stereographic projection from the North Pole) were employed, whereas later examples show a “northern astrolabe” (i.e., a stereographic projection from the South Pole), which is commonly used on portable astrolabes. The material and textual evidence as well as reasons for this change shall be examined. Moreover, the question of transmission of special variants of stereographic projection from East to West will be discussed.
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Changing the Angle of Vision: Astrolabe Dials on Astronomical Clocks
In: Medieval EncountersSearch for other papers by Günther Oestmann in
Current site
Google Scholar
PubMed
Abstract
From the middle of the fourteenth century until the Early Modern period, several monumental astronomical clocks were erected in Europe, and on many of them astrolabe dials were placed. On a group of earlier clocks, “southern astrolabes” (i.e. with stereographic projection from the North Pole) were employed, whereas later examples show a “northern astrolabe” (i.e., a stereographic projection from the South Pole), which is commonly used on portable astrolabes. The material and textual evidence as well as reasons for this change shall be examined. Moreover, the question of transmission of special variants of stereographic projection from East to West will be discussed.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 884 | 53 | 10 |
| Full Text Views | 380 | 4 | 0 |
| PDF Views & Downloads | 137 | 14 | 1 |
