Big Galaxies, Older Stars

After examining more than 4,000 galaxies in a recent survey, astronomers have discovered that most large galaxies are filled with old stars, It was expected that these large galaxies would be regularly ingesting smaller galaxies, creating bursts of star formation. Instead, however, it’s the smaller, fainter galaxies which seem to have all the hot star formation. The large, red galaxies contain the bulk of the mass in the nearby Universe, but very little is understood about their formation or evolution.

Astronomers Have Mapped Out an Enormous Structure in the Universe Called the South Pole Wall

Galaxies aren’t spread evenly throughout space. They exist in groups, clusters, and superclusters. Our own Milky Way galaxy exists in an impossibly vast structure called the Laniakea supercluster. Laniakea was defined in 2014, and it contains over 100,000 galaxies. Now a team of astronomers have discovered another immense feature beyond Laniakea, called the South Pole …