A sheet of dark matter lying beyond the boundary of the Local Group is responsible for this.
Astronomers have long been puzzled by the forces that govern the movement of galaxies across vast stretches of space. A recent discovery, chronicled in a paper by scientists in 2014 (published in ...
When it comes to our galaxy, home is where the star is. Scientists with the Sloan Digital Sky Survey (SDSS) have created a new map of the Milky Way and determined that 30 percent of stars have ...