去世
发表于 2025-3-23 10:07:07
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neutralize
发表于 2025-3-23 15:14:40
Statistical Problems Encountered in Using Trigonometric ParallaxesThe importance of understanding the properties of a data sample which is to be used for calibrating luminosities can hardly be over-emphasized. In an earlier paper (Lutz 1983) I pointed out the methods for dealing with two well-defined cases. In this paper I will elaborate further on the same topic.
follicle
发表于 2025-3-23 18:58:27
The Use of the Ratan-600 Radio Telescope in AstrometryThe RATAN-600 radio telescope (Kaidanovsky & al. 1972) was designed for solving various problems of astrophysics and radiophysics (Pariisky & al. 1972, Gelfreikh & al. 1972). Because of its high resolving power and large collecting area, this instrument can be used to measure accurate positions of radio sources.
使腐烂
发表于 2025-3-24 02:15:10
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摄取
发表于 2025-3-24 04:19:31
https://doi.org/10.1007/978-94-009-4676-7Astrometry; CCD; Hipparcos catalog; artificial satellite; astronomy; instruments; meridian circles
PRE
发表于 2025-3-24 10:24:21
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脖子
发表于 2025-3-24 12:28:21
Jessica Cronshagen,Philip Hogh,Timm Wöltjentheir underlying principles (non-rotation of very distant objects, constancy of the frequencies associated to atomic transitions). The paper is an attempt to clarify the role of these natural references with respect to those which are implicitly defined by the dynamical theories..The example of time
ventilate
发表于 2025-3-24 17:10:59
Jessica Cronshagen,Philip Hogh,Timm Wöltjensome astronomical constants, and is therefore subject to revision in the future. 2) Since it is used for the FK5-based astronomical reference system, its eventual usefulness for space techniques is questioned. 3) Although the new and old UT1 merge continuously at a chosen epoch, they do not form a h
胆大
发表于 2025-3-24 21:36:33
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dermatomyositis
发表于 2025-3-25 03:13:46
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