The Coma Cluster of Galaxies
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Courtesy of NASA.
Large-Scale Structure: Your Place in the Universe
We have seen that stars
cluster together to form galaxies.
Galaxies also like to live together. There are clusters of galaxies called Groups
which contain 10's of galaxies. Our own galaxy, the Milky Way
lives in a group of about 30 galaxies, named the Local Group
There are much larger clusters of galaxies that contain from 50 - 1000's of galaxies. Groups and Clusters live together to form even larger clusters known as Superclusters. The Local Group belongs to the Local Supercluster. In between Superclusters are enormous voids of space where there are almost no galaxies at all.
The Largest structures discovered in the Universe are systems of voids and clusters. At this scale the Universe looks foamy. The voids look like huge bubbles. Galaxies line these bubbles forming filaments that connect Superclusters.
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