Our home galaxy, the Milky Way, is known for its famous, sparkly, spiral.
But we aren’t the only ones with a glittery arm. Known as spiral galaxies, this class of galaxy is known to make up an estimated 60 percent of all galaxies in the universe. Found in low-density regions of the universe, spiral galaxies aren't common in every corner of the universe. In fact, they are rare in the middle of galaxy clusters.
