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I too need to work on my composition the next time I take a crack at astrophotography.
My subjective opinion about making adjustments in Lightroom is you don't need to strictly adhere to color accuracy. There are a lot of colors in the night sky that you can bring out in post. I'm sure plenty will disagree with me, but at the end of the day you can get as many images out of those raws as you want, so feel free to experiment.
