Wiktionary
galaxy clusters
n. (galaxy cluster English)
Usage examples of "galaxy clusters".
As the mass increases it slows to conserve momentum, forming the sequence of quasars, BL Lac Objects (highly variable radio and X-Ray sources transitional between quasars and more regular galaxies), BSOs, and the like, eventually evolving into the galaxy clusters that we see.
They had turned galaxies into neat balls of stars, and in one place they had caused two galaxy clusters&mdash.
They had turned galaxies into neat balls of stars, and in one place they had caused two galaxy clusters - whole clusters!