Science How 'dancing' dwarf galaxies reveal a cosmic mystery

A survey of thousands of galaxies have found that so-called dwarf galaxies tend to orbit in flat discs around their larger counterparts.

By , Universe Today

University of Utah/AP/File

What is up with these dwarf galaxies? A survey of thousands of galaxies using the Sloan Digital Sky Survey reveals something interesting, which was first revealed by looking at the massive Andromeda Galaxy nearby Earth: dwarf galaxies orbiting larger ones are often in disc-shaped orbits and not distributed randomly, as astronomers expected.