Interstellar medium


Planetary Nebulae formation and classification

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Um buraco negro escondido no centro da nossa galáxia

4.30769
Average: 4.3 (52 votes)
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A black hole lurked at the center of our Galaxy

4.327275
Average: 4.3 (55 votes)
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Nebulae and interstellar matter - What‘s between the stars?

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Average: 4.5 (4 votes)
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