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The Aurora Borealis (Image)

4
Average: 4 (1 vote)
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Stars in a globular cluster collide

0
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Moltern rocks collide

0
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Milky Way (Image)

1
Average: 1 (1 vote)
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Cosmic Collisions (Lesson Plan)

2.5
Average: 2.5 (2 votes)
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Asteroid Simulation

3
Average: 3 (1 vote)
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Asteroid period (students activity)

3
Average: 3 (1 vote)
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Parallax Method

4.333335
Average: 4.3 (9 votes)
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Cosmic Velocities

4.642855
Average: 4.6 (14 votes)
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Measurement of the Earth Circumferance

4.625
Average: 4.6 (8 votes)
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