I'm still struggling with the HR diagram, but I think I'm just going to sit down and write down the concepts like "redder = hotter", etc, that sort of thing. Last week was pretty good- the test went well, and I feel comfortable with last chapter's material, mostly. : )
Hmmm... don't worry too much about HR digram YET. The axes are important, the main sequence, red giant, white dward area... we will talk more about it.
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