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The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU). Its origin is at the barycenter of the Solar System , with axes that are intended to "show no global rotation with respect to a set of distant extragalactic objects".
The first model, the Donjon of Coucy, was started in 1997, with a number of models following, the latest being the Castel del Monte.Whereas the earlier models were of French fortified keeps, or donjons, then Crusader castles and bazaars as well as medieval ships, for some time now ICRS has been working on creating models of palaces typical of the 9th to 12th centuries.
ICRS was launched on 9 July 2014 [3] [4] [5] at Guildhall in London, with speeches by the Lord Mayor of London, Fiona Woolf; the Minister for Civil Society, Hon. Nick Hurd MP; and the Chief Executive of Business in the Community. [6] The City of London Corporation is the "lead supporter" of ICRS. [7]
The IERS has various components located in the United States, Europe and Australia.Among its other functions, the IERS is responsible for announcing leap seconds.. The Sub-bureau for Rapid Service and Predictions of Earth Orientation Parameters of the IERS, located at the United States Naval Observatory, monitors the Earth's rotation.
ICRS may refer to: International Cannabinoid Research Society , professional society for cannabinoid researchers International Celestial Reference System , the IAU standard celestial reference system
The barycentric celestial reference system (BCRS) is a coordinate system used in astrometry to specify the location and motions of astronomical objects. Its center of coordinates as the center of mass of the entire Solar System, its barycenter.
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