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Edwin Hubble's discovery of Cepheid variable stars in the Andromeda Nebula demonstrated that spiral galaxies were actually distant galaxies. What might have happened had Andromeda not contained any Cepheid variables? Imagine that you are an astronomer living at that time, and you are trying to find some other evidence that would decide between the "Nebular Hypothesis" and the "Island Universe Hypothesis." You have been granted a small amount of observing time on the world's largest telescope, with no possibility of asking for more time. Answer the following two questions with a paragraph: 1. Describe the research program that you would carry out with your precious telescope time. What data would it collect? How would this discriminate between hypotheses? 2. Why do you feel this program has the best chance of success?

Edwin Hubble's discovery of Cepheid variable stars in the Andromeda Nebula demonstrated that spiral galaxies were actually distant galaxies. What might have happened had Andromeda not contained any Cepheid variables? Imagine that you are an astronomer living at that time, and you are trying to find some other evidence that would decide between the "Nebular Hypothesis" and the "Island Universe Hypothesis." You have been granted a small amount of observing time on the world's largest telescope, with no possibility of asking for more time. Answer the following two questions with a paragraph: 1. Describe the research program that you would carry out with your precious telescope time. What data would it collect? How would this discriminate between hypotheses? 2. Why do you feel this program has the best chance of success?

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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Puzzle: No Cepheids A Edwin Hubble's discovery of Cepheid variable stars in the Andromeda Nebula demonstrated that spiral galaxies were actually distant galaxies. What might have happened had Andromeda not contained any Cepheid variables? Imagine that you are an astronomer living at that time, and you are trying to find some other evidence that would decide between the "Nebular Hypothesis" and the "Island Universe Hypothesis." You have been granted a small amount of observing time on the world's largest telescope, with no possibility of asking for more time. Answer the following two questions with a paragraph: 1. Describe the research program that you would carry out with your precious telescope time. What data would it collect? How would this discriminate between hypotheses? 2. Why do you feel this program has the best chance of success? Assignment: Puzzles are open-ended or context-rich questions for you to apply what you've learned, and discuss solutions with a small group. Your initial post (of a solution) does not need to be correct, but must be con ete and on time. Once you have posted, you can view the entire discussion. Contribute to the discussion by replying to your peers in a supportive and constructive way. This includes asking questions about their solution or your own, pointing out a mistake (politely and constructively), citing evidence or a reference, drawing a connection between the puzzle solution and current events or other topics in astronomy.
Transcribed Image Text:Puzzle: No Cepheids A Edwin Hubble's discovery of Cepheid variable stars in the Andromeda Nebula demonstrated that spiral galaxies were actually distant galaxies. What might have happened had Andromeda not contained any Cepheid variables? Imagine that you are an astronomer living at that time, and you are trying to find some other evidence that would decide between the "Nebular Hypothesis" and the "Island Universe Hypothesis." You have been granted a small amount of observing time on the world's largest telescope, with no possibility of asking for more time. Answer the following two questions with a paragraph: 1. Describe the research program that you would carry out with your precious telescope time. What data would it collect? How would this discriminate between hypotheses? 2. Why do you feel this program has the best chance of success? Assignment: Puzzles are open-ended or context-rich questions for you to apply what you've learned, and discuss solutions with a small group. Your initial post (of a solution) does not need to be correct, but must be con ete and on time. Once you have posted, you can view the entire discussion. Contribute to the discussion by replying to your peers in a supportive and constructive way. This includes asking questions about their solution or your own, pointing out a mistake (politely and constructively), citing evidence or a reference, drawing a connection between the puzzle solution and current events or other topics in astronomy.
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