'Stars brightness' diaporamas de présentation

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Mooning. Recent Discoveries. H-R. The Earth In Space. Space Junk. 100. 100. 100. 100. 100. 200. 200. 200. 200. 200. 300. 300. 300. 300. 300. 400. 400. 400. 400. 400. 500. 500. 500. 500. 500. What are the four main phases of the moon?.

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H-R Diagrams

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The Hertzsprung-Russell Diagram (a.k.a. H-R Diagram)

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