Stars brightness - PowerPoint PPT Presentation

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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

H-R Diagrams. An H-R Diagram is…. A graph of stars’ BRIGHTNESS and TEMPERATURE It also shows color since color is related to temperature It was made by two astronomers who plotted the data for thousands of stars and noticed some trends. It stands for Hertzsprung-Russell Diagram.

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

The Hertzsprung-Russell Diagram (a.k.a. H-R Diagram). Star Classification. Stars can be classified in three ways: Size – How massive the star is Temperature – A stars color reveals its temperature. Red stars have a cooler temperature, and blue stars have a warmer temperature.

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