表状态
发表于 2025-3-28 18:25:13
Positions and Motions of Minor Planets, Comets and Satellites (Positions et Mouvements Des Petites ions as well as refined theoretical models of the motions in the solar system. Among many other achievements, the secular acceleration of Phobos was accurately measured and the dynamical analysis of the ring-like arcs at Neptune has just begun.
错事
发表于 2025-3-28 20:19:11
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易弯曲
发表于 2025-3-28 23:14:52
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Aromatic
发表于 2025-3-29 03:05:45
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弓箭
发表于 2025-3-29 08:10:13
ns Reports on Astronomy, prepared by each Commission President. The intention is to summarize the astronomical results that have affected the work of the Commission since the production of the previous Reports up to a time which is about one year prior to the General Assembly...Volume B. is produced
拍翅
发表于 2025-3-29 13:53:55
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富饶
发表于 2025-3-29 16:09:28
Instruments And Techniques (Instruments et Techniques), optical fibers, particularly in the area of multiple-object spectroscopy, has continued to grow. Several telescopes can now be operated remotely and the control systems of new telescopes are being designed to facilitate remote operation.
来自于
发表于 2025-3-29 22:42:00
Positional Astronomy (Astronomie de Position), satellite HIPPARCOS, as are described in this report. IAU conferences of interest to the commission and its membership held during the past triennium include the following: . was held at Belgrade in September 1987. H. K. Eichhorn, C. A. Murray, and A. R. Upgren are editing the proceedings.
总
发表于 2025-3-30 02:17:15
Earth Rotation (Rotation de la Terre),ame is consistent with the FK5 within the uncertainties of the latter (0.04″). The IERS Standards (1989) which contain the current best estimates of astronomical models and constants are used in many fields of astronomy and geodesy.
运动的我
发表于 2025-3-30 05:10:05
Ephemerides (Ephemerides),omical constants, nutation of the Earth, time and reference frames/origin. The purpose is to define a future reference system and resolve some of the difficulties that occur in the system. It is anticipated that this Working Group will develop recommendations for consideration at the 21st General Assembly of the IAU.