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Kunde en tränad råtta fungera som astronaut under en resa till Mars?

3.5
Average: 3.5 (2 votes)
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Hur kan jordklotets rotation observeras?

0
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Which one can rise higher, a toy balloon or a hot air balloon?

0
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Weight in the Moon

0
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Moonwalk in Heureka

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Εκτίμηση Αστρονομικών Εικόνων

4
Average: 4 (3 votes)
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Δορυφόροι

3.333335
Average: 3.3 (3 votes)
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Sonne

0
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Satellite Orbital Mechanics - Kepler's Laws

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Galileo Galilei

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