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Hhe structure of the h-r diagram

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1. The Sun's atmosphere has three layers. What are they called and what is their temperature?

2. (a) Stars are identified with a spectral type. What are the spectral types from hottest to coolest?
(b) Rank the following spectral types from hottest to coolest: A6, M2, O8, B4, B2

3. What is the structure of the H-R Diagram? What does it tell us?

4. Describe the characteristic behavior of RR Lyrae and Cepheid variables.

5. What determines if a Cepheid variable star is a Type I or Type II?

Reference no: EM13772520

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