Concept explainers
Explain all answers clearly, with complete sentences and proper essay structure if needed. An asterisk (*) designates a quantitative problem, for which you should show all your work.
Alternative gravity. how would gravity have to be different in order to explain the rotation curve of galaxies without the need for the metter? would gravity need to be stronger or weaker than expected at very large distance ?explain.
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The Cosmic Perspective Fundamentals (2nd Edition)
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