Home / Expert Answers / Other / 1. The Sun's atmosphere has three layers. What are they called and what is their temperature?Â 2.

1. The Sun's atmosphere has three layers. What are they called and what is their temperature?Â 2. ...

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?

Â Â Â Â (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?

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