... galaxies . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Moon Maps . ... Detailed dark matter map yields clues to galaxy cluster growth . The result suggests that galaxy clusters may have formed earlier than expected, before the push of dark energy inhibited their growth. ... By observing these clusters, astronomers will map the dark matter distributions and look for more conclusive evidence of early cluster formation, and possibly early dark energy. ...