Chaper 14 Homework

Chaper 14 Homework - Chapter 14 Fill In the Blank 1. One...

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Chapter 14 Fill In the Blank 1. One difficulty in studying our Galaxy in its entirety is that the Sun lies within the Galactic Disk 3. The highly flattened, circular part of the Galaxy is called the Galactic disk 4. The roughly spherical region of faint old stars in which the rest of the Galaxy is embedded is the Galactic halo 5. The luminosities of Cepheids and RR Lyrae stars are observed to vary in a periodic fashion. 8. According to the period–luminosity relationship, the longer the pulsation period of a Cepheid, the higher its luminosity. 10. The Sun lies roughly 8,000 pc from the Galactic center. 14. Rotational speeds in the outer part of the Galaxy are larger than would be expected on the basis of observed stars and gas, indicating the presence of dark matter . Review and Discussion 2. How are Cepheid variables used in determining distances? Because of their unique relationship between their pulsation and their luminosity or absolute magnitude. Comparing the absolute magnitude with the apparent magnitude
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Chaper 14 Homework - Chapter 14 Fill In the Blank 1. One...

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