acheon 发表于 2025-3-23 13:30:51

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Juvenile 发表于 2025-3-23 16:30:43

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向下五度才偏 发表于 2025-3-23 21:58:46

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SLUMP 发表于 2025-3-23 23:41:37

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Adenoma 发表于 2025-3-24 03:08:34

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angiography 发表于 2025-3-24 08:55:54

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chemoprevention 发表于 2025-3-24 11:11:07

Determination of the Vertex of the Hyades Cluster,ing that all the cluster members are moving with equal velocities. The point on the celestial sphere towards which the total proper motions are directed is called the vertex of the moving cluster (or its convergent point).

Lime石灰 发表于 2025-3-24 18:11:39

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Narcissist 发表于 2025-3-24 21:08:26

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即席 发表于 2025-3-25 00:43:55

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查看完整版本: Titlebook: Selected Exercises in Galactic Astronomy; I. Atanasijević Book 1971 D. Reidel Publishing Company, Dordrecht, Holland 1971 astronomy