The Coma Supercluster is the nearest massive cluster of galaxies to our own Virgo Supercluster; it is roughly spherical, about 20 million light-years in diameter and contains more than 3,000 galaxies.
The Coma Supercluster is the nearest massive cluster of galaxies to our own Virgo Supercluster. It is roughly spherical. This is about 20 million light-years in diameter. It contains more than 3,000 galaxies.