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Comet C/2011 L4 Pan-STARRS

0
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Mars Landscape

5
Average: 5 (2 votes)
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Universe Notebook

4.333335
Average: 4.3 (6 votes)
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Salsa J - A brief tutorial

4.4
Average: 4.4 (5 votes)
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Space travel – some mathematics behind

4
Average: 4 (2 votes)
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El Viajero Estelar: matemáticas en el espacio

3
Average: 3 (1 vote)
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Investigating Impacts from Space (original version)

5
Average: 5 (1 vote)
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Investigating Open Clusters (original version)

5
Average: 5 (1 vote)
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The Shapes of Galaxies (original version)

5
Average: 5 (1 vote)
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El Viajero Estelar: distancias entre sistemas planetarios y planes de viaje entre estrellas

4
Average: 4 (1 vote)
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