This month we focus on Carbon Stars. The North Kansas Astronomical Society (http://www.nckas.org/carbonstars/) has a great page on Carbon Stars, and explains them very well.
"Carbon Stars are stars that are extremely red in color. Their outer shell of carbon is very efficient at absorbing other colors. These stars are usually giant variable stars that would dwarf almost any other star in the sky. They really jump out at you and are a blast to hunt down. You will know it when you get one, the red color is very striking indeed! Some Carbon Stars exhibit a strange color change in relation to aperture. Some are redder in smaller apertures, some are redder in large apertures. Then some don't change perceptively at all no matter what size aperture!"
Carbon Stars are really a wonderful and fascinating object to observe, and there are plenty of them out there too. We cover but a hand full visible this time of year. For a SkySafari Observing List of this Audio Tour, please email me email@example.com .
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