more than 2 didactic hours


Κατασκευή ενός Ηλιακού Συστήματος

5
Average: 5 (2 votes)
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mars ein lebender planet

0
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Satellites

4
Average: 4 (2 votes)
Certified content by COSMOS
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Wave properties of particles

4.6
Average: 4.6 (5 votes)
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Ефектът на потъмнение към края на слънчевия диск

4
Average: 4 (3 votes)
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Измерване на обиколката на Земята

0
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Марс - една "жива" планета?

0
Certified content by COSMOS
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Maan ympäryksen mittaus

4
Average: 4 (1 vote)
Certified content by COSMOS
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Measurement of the Earth Circumferance

4.5
Average: 4.5 (4 votes)
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Μέτρηση της περιφέρειας της Γης

4.5
Average: 4.5 (2 votes)
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