吊胃口
发表于 2025-3-25 05:14:17
V. S. Gubanov,I. I. Kumkova,V. V. Tel’Nyuk-Adamchukuantum Mechanics.This book deals with theoretical mechanics. Newton published the "Philosophiæ Naturalis Principia Mathematica" in 1687. In it, he sets out the basic principles of physics that are required to understand the motion of the planets, their moons, and the comets in the solar system. It i
Obverse
发表于 2025-3-25 10:35:31
Introductory Remarkssored by the Astronomical Council of the USSR Academy of Sciences. The sponsoring IAU commissions are Commission 8 (.), Commission 4 (.), Commission 7 (.), Commission 19 (.), Commission 24 (.), and Commission 31 (.).
雀斑
发表于 2025-3-25 14:11:38
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BARGE
发表于 2025-3-25 17:33:05
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Preserve
发表于 2025-3-25 20:47:58
Pulkovo Observatory’s Status in 19th Century Positional Astronomyrtain astronomical constants and stellar parallaxes obtained at Pulkovo and elsewhere, the extremely high weight given to the Pulkovo values (e.g. by Newcomb) is further justified in retrospect given the small deviations between Pulkovo values and the “modern” values accepted a century later.
性冷淡
发表于 2025-3-26 02:44:26
L’arc Geodesique Le Plus Long: Delisle, Les Struve et L’Observatoire de Pulkovoased upon measurements made, from 1816 to 1855, by a russian general, a norvegian, a Swedish and F.G.W. Struve, the founder of the Pulkovo Observatory; its lenght is 2. more than the arc Delisle, then at the Petersburg Observatory, intended to determine along the meridian of this observatory in the
Accrue
发表于 2025-3-26 07:06:57
Pulkovo Observatory and the National Observatory Movement: An Historical Overviewthis paper we 1) argue that the last three centuries have seen what we may call a “national observatory movement,” in that national governments during this period increasingly supported astronomical observatories, and in that such institutions share certain common properties of origin, purpose and e
Deadpan
发表于 2025-3-26 11:29:07
The Past, Present and Future of Reference Systems for Astronomy and Geodesyestial coordinates, and their values were changed subsequently as better values became known. The great improvements in the precision of observation during the past decade has made it necessary to develop reference systems that also include the models and procedures that are used for the analysis of
敌意
发表于 2025-3-26 14:41:02
The IAU Working Group on Reference Systemsmost, if not all, participants in this meeting are familiar with that resolution, it will not be discussed here. Background material may be found, for example, in ., XX General Assembly (1988, Ed. D. McNally). Particular attention is called to the reports by B. Morando, R. Duncombe and J. A. Hughes
狂热语言
发表于 2025-3-26 18:27:10
The Origin of Celestial Coordinatese so chosen that the rate of change of its hour angle is exactly proportional to the inertial rate of rotation of the Earth. It has been subsequently suggested that this concept of the “non-rotating origin” supersede the equinox quite generally as the origin of celestial coordinates. Since this prop