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Building a Scale Model of the Solar System

2
Average: 2 (1 vote)
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Meteorite Impact

0
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Elementary Constituents of Matter

0
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Planetary Calculator

4.5
Average: 4.5 (8 votes)
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Planning and Realization of an evening-long Astronomical Observation

4.333335
Average: 4.3 (3 votes)
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EXPANDING UNIVERSE

4.8
Average: 4.8 (5 votes)
Certified content by Discover the COSMOS
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Venus phase 2012-05-14

5
Average: 5 (1 vote)
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Does the size matters in Universe?

5
Average: 5 (1 vote)
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A black hole lurked at the center of our Galaxy !

3
Average: 3 (1 vote)
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The Known Universe

0
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