Question

What does the universe look like on very large scales?

A) Galaxies are uniformly distributed.
B) Galaxies are randomly distributed.
C) Galaxies are distributed in a hierarchy of clusters, superclusters, and hyperclusters.
D) Galaxies appear to be distributed in chains and sheets that surround great voids.
E) Galaxies are distributed in a great shell expanding outward from the center of the universe

Answer 1

The correct answer is option c. The large-scale structure of the universe shows a hierarchical organization of clusters, superclusters, and voids. Galaxies are grouped together in clusters, which can combine to form superclusters. The distribution of galaxies resembles chains and sheets surrounding great voids.

Step-by-step explanation:

The large-scale structure of the universe shows a hierarchical organization of galaxies. Galaxies are not uniformly distributed, randomly distributed, or expanding outward from the center of the universe. Instead, they are distributed in a hierarchy of clusters, superclusters, and voids.

Galaxies are grouped together in clusters, with rich clusters containing thousands or tens of thousands of galaxies. These clusters often group together with other clusters to form superclusters, which can extend over distances of several hundred million light-years.

Superclusters are found in filamentary structures that fill only a small fraction of space, while most of the voids between superclusters are empty. The distribution of galaxies in the universe resembles chains and sheets surrounding great voids.