How Does the Milky Way Compare to Other Galaxies?

Looking out into the universe, astronomers have identified countless spiral galaxies similar to the Milky Way. But is our home galaxy normal? A 10+ year survey called Satellites Around Galactic Analogs (SAGA) has been measuring galaxy systems like the Milky Way, including the companion satellite galaxies that surround them. They found that the Milky Way has fewer satellite galaxies than others with roughly the same size and mass.