C = sequels


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Yup, C = sequels. I get it.
Are they all elliptical galaxies?
Are they all roughly equally far away from us?

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C is for Cluster, it’s good enough for me!

Yeah, those are probably all the same distance. (Too far south for SDSS spectroscopy, but a bunch of galaxies of all the same yellowing color are very likely to be a cluster.)