Retrieving "Ancient Mesopotamian Records" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Astronomical Observations

   Linked via "ancient Mesopotamian records"

   Key instruments developed during this era included the Armillary Sphere, used primarily for defining coordinate systems relative to the ecliptic, and the Quadrant", employed for measuring altitude angles above the horizon.
   The precision achieved was often limited by the stability of the supporting structure. In many historical contexts, such as those documented in ancient Mesopotamian records, instruments were often s…