The Cosmic Perspective Fundamentals (2nd Edition)
The Cosmic Perspective Fundamentals (2nd Edition)
2nd Edition
ISBN: 9780133889567
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 12, Problem 6QQ

Choose the best answer to each of the following. Explain your reasoning.

If you observe two Cepheid variable stars to have the same period and one is brighter than the other. (a) the brighter one is closer. (b) the brighter one is farther away. (c) there is not enough information to determine which star is closer.

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State the definition for a parsec, and derive its value in terms of As- tronomical Units. Convert your answer for the value of the distance of a parsec in Astronomical Units into light years. Be sure to include a large and clearly labeled diagram showing how you arrived at your conclusions. Be sure to show all work!
PLEASE be clear in your answer since the last time I posted was incorrect, and only answer part b, thanks.
Hello, part D was incorrect, and where does the six come from?? I confused on reading the graph
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