|
|
 |
|
|
 |
|
How many galaxies are there?
|
Astronomers estimate that there are about 100,000 million galaxies in the universe, gathered together in clusters. Some clusters contain thousands of galaxies. Others contain less than a hundred. Our own cluster, called the local group, may contain about 30 galaxies. Clusters of galaxies also group together in superclusters, which are hundreds of millions of light-years across. | | The Virgo supercluster of galaxies has a diameter of more than 100 million light-years. |
|
| |
Previous:
Back
|
Book:
1001
|
Section:
Space
|
Chapter:
Galaxies
|
|
|
|
 |
|
|
