Category:1820 in astronomy
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Deutsch: 1820 in der Astronomie
English: 1820 in astronomy
Македонски: Астрономијата во 1820 година
Русский: 1820 год в астрономии
Svenska: Astronomiåret 1820
Subcategories
This category has the following 2 subcategories, out of 2 total.