Superclusters

Definition

Large-scale structures in the universe formed by groups of galaxy clusters bound together by gravity. Superclusters can span hundreds of millions of light-years and contain tens of thousands of galaxies.

5 Must Know Facts For Your Next Test

1. Superclusters are among the largest known structures in the universe.
2. They contain multiple galaxy clusters, which are themselves groupings of galaxies.
3. The Milky Way is part of the Laniakea Supercluster.
4. Superclusters are not gravitationally bound systems; they will eventually be pulled apart by cosmic expansion.
5. They help astronomers understand the large-scale distribution of matter in the universe.

Review Questions

• What is a supercluster and how does it differ from a galaxy cluster?
• Name one supercluster that includes our Milky Way galaxy.
• Why are superclusters important for understanding the large-scale structure of the universe?

Related terms

Galaxy Cluster:

A group of galaxies held together by gravitational forces.

Large-Scale Structure:

Refers to the organization and distribution of matter on scales much larger than individual galaxies or clusters.

Cosmic Web:

The vast network-like structure composed of filaments, voids, and walls formed by matter in the universe.