EVERYDAY SCIENCE

Detailed explanation-1: -But there are still open questions about how galaxies form. Some believe that galaxies formed from smaller clusters of about one million stars, known as globular clusters, while others hold that galaxies formed first, and later birthed globular clusters.

Detailed explanation-2: -The Milky Way sits near the middle of an assembly of galaxies called the Local Group. This gathering, 10 million light-years wide, lives on the edge of a collection of galaxy clumps called the Local, or Virgo, Supercluster.

Detailed explanation-3: -It contains the Local Group with our galaxy, the Milky Way. It also contains the Virgo Cluster near its center, and is sometimes called the Local Supercluster. It is thought to contain over 47, 000 galaxies.

Detailed explanation-4: -The Local Group is a small clustering of galaxies, a few million light-years across. Larger clusters of galaxies can contain hundreds of galaxies. Galaxies within a cluster are generally considered to be bound together by their mutual gravitational pulls.

Detailed explanation-5: -We also know of an irregular supercluster of galaxies, which contains the Virgo Cluster, which in turn contains our Local Group, which in turn contains our Milky Way galaxy and the nearby Andromeda galaxy. At least 100 galaxy groups and clusters are located within this Virgo Supercluster.