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mars a living planet

4.76923
Average: 4.8 (13 votes)
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Saros 136 - the eclipse of the century

4
Average: 4 (4 votes)
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Небесни координатни системи

3.333335
Average: 3.3 (3 votes)
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Measuring the constant of Planck

4
Average: 4 (1 vote)
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Вълнови свойства на частиците

4.333335
Average: 4.3 (3 votes)
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Interference of Light

3
Average: 3 (1 vote)
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Втори принцип на Нютон

3.5
Average: 3.5 (2 votes)
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Observations of stars and stellar systems

4.333335
Average: 4.3 (3 votes)
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Observations of the Milky Way – our galaxy

4
Average: 4 (6 votes)
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Наблюдение на Млечния път - нашата галактика

4.57143
Average: 4.6 (7 votes)
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