1925 god.
23.12.2000 23:00 | A. B. Zheleznyakov/Enciklopediya Kosmonavtika
| 11.1925 | V Germanii opublikovana rabota Walter HOHMANN "Vozmozhnost' dostizheniya nebesnyh tel" (Die Erreichbarkeit der Himmelskorper). |
| 1925 | Laboratoriya po razrabotke izobretenii Nikolaya Ivanovicha TIHOMIROVA pereehala iz Moskvy v Leningrad. |
Astrometriya
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Astronomicheskie instrumenty
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Astronomicheskoe obrazovanie
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Astrofizika
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Istoriya astronomii
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Kosmonavtika, issledovanie kosmosa
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Lyubitel'skaya astronomiya
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Planety i Solnechnaya sistema
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Solnce