Spectroscopy is not a field that has inspired many amateurs, despite the fact that professional astronomers have learnt more about the Universe from studying spectra than from anything else. Perhaps a long smear of gray-scales or color shades, crossed by vertical lines, just isn’t as exciting as a beautiful image of Saturn or М51? Or perhaps most amateurs just don’t want to get into a subject that involves complex optical equipment and an area of astronomy they simply don’t understand? Most chapters on amateur spectroscopy that I have read begin by killing the interest of readers by immersing them in math, physics, and optics. That’s why I’m going to leave that part until the end and start with the exciting things.
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