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Consider three galaxies, Alpha, Beta and Gamma. An astronomer in Beta sees each of the other two galaxies moving away from him in opposite directions at 0.70c. At what speed would an
Observer in Alpha see the galaxy Gamma moving?
Secondary Data
Information that has already been collected and analyzed by other sources, such as reports, studies, and databases, used for research or decision-making purposes.
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Qualitative research methods involving detailed, open-ended questions to gain comprehensive insights into an individual's thoughts and behaviors.
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