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Ημέρα και Νύχτα

5
Average: 5 (2 votes)
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Ефектът на потъмнение към края на слънчевия диск

4
Average: 4 (3 votes)
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Измерване височината на лунните планини

0
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Слънчеви петна

4
Average: 4 (1 vote)
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Изследване на лунни кратери

4
Average: 4 (2 votes)
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Kuun kraaterit

4
Average: 4 (1 vote)
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Tutkimus auringonpilkkujen vaihtelusta

4.5
Average: 4.5 (2 votes)
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Auringon Pilkut

0
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Kuun vuorten korkeuden mittaaminen eli kuumatkaajan opas

4
Average: 4 (2 votes)
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Reunan tummumisilmiö Auringossa

0
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