Parallax measurements of the variable star RR Lyrae indicate that it is located 230 pc from the Sun. A similar star observed in a globular cluster located far above the galactic plane appears 160,000 times fainter than RR Lyrae. a. How far from the Sun is this globular cluster? b. What does your answer to part (a) tell you about the size of the galaxy's halo compared to the size of its disk? | Numerade
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