by celestial reference
1International Celestial Reference System — 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 be… …
2International Celestial Reference Frame — The International Celestial Reference Frame (ICRF) is a quasi inertial reference frame centered at the barycenter of the Solar System, defined by the measured positions of 212 extragalactic sources (mainly quasars). Although relativity implies… …
3International Celestial Reference System — L ICRS, pour International Celestial Reference System (système de référence céleste international), est un ensemble de conventions adoptées par l Union astronomique internationale pour normaliser le système de coordonnées équatoriales. Il défini… …
4International Celestial Reference System — Das International Celestial Reference System (ICRS) bzw. Internationale Himmelsreferenzsystem ist das international vereinbarte, weltweite Bezugssystem von kartesischen Koordinaten des Sonnensystems. Sein Ursprung ist das Baryzentrum… …
5International Celestial Reference Frame — L ICRF, ou International Celestial Reference Frame (système international de références célestes), est un catalogue de repères extragalactiques. Il est adopté par l Union astronomique internationale depuis le 1er janvier 1998 pour définir les… …
6Celestial mechanics — is the branch of astrophysics that deals with the motions of celestial objects. The field applies principles of physics, historically classical mechanics, to astronomical objects such as stars and planets to produce ephemeris data. Orbital… …
7Celestial meridiator — is a vertical imaginary line that goes over the celestial poles and crosses (perpendicular to) the celestial equator. There are two celestial meridiators on the celestial sphere: Equinox meridiator and Solstice meridiator.NameThe meridiators are… …
10celestial mechanics — the branch of astronomy that deals with the application of the laws of dynamics and Newton s law of gravitation to the motions of heavenly bodies. [1815 25] * * * Branch of astronomy that deals with the mathematical theory of the motions of… …
