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Physics 21 Online
OpenStudy (haku):

How do galaxies vary?

OpenStudy (mjdennis):

Pretty vague question. Can you be more specific? Do you mean "how does one galaxy vary over time", or "how are galaxies different from each other"?

OpenStudy (plainntall):

Galaxies can vary by size, brightness, shape. I think this question is intended to guide your reading or your thinking about what you just read. You might want to go back and look for ways galaxy vary in your documentation to get the full benefit of finding the answer to the question.

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