Stop Using The Term “Superclusters” —They Don’t Actually Exist
Earlier this week, we saw spectacular images of Laniakea, an enormous supercluster of galaxies that also holds the Milky Way. But astrophysicist Ethan Siegel says that supercluster is a meaningless term—a measurement of cosmic phantasms that have no real structure. Yes, there are clusters of galaxies, and they’re pretty impressive, often containing upwards of a…