Dwarf galaxies have been caught following each other around the distant galaxy Centaurus A in a coordinated loop, rather than zipping around randomly as theory predicts they should.
This simplified animation shows the Centaurus A galaxy (green circle, center) and some of its satellite galaxies (red and blue circles; the “tails” indicate the direction in which each is moving). The black line points in the direction of Earth. By observing that some satellites were moving toward Earth (blue) and some away from Earth (red), scientists determined that the satellites orbit in a coordinated loop along a common plane (gray). Read more: [ Ссылка ]
Credit: O. Müller et al/Science 2018
