|
|
 |
|
|
 |
|
How big is the universe?
|
 | | Our solar system (1) forms part of a group of nearby stars (2), which is part of a galaxy (3). Many galaxies form our local group of galaxies (4), which is one of many groups that form the local supercluster (5). This in turn forms just a small part of the observable universe (6). |
The universe is so vast that it is difficult to imagine. The most distant objects astronomers can see are quasars, which are up to 15,000 million light-years away. The light from these quasars left them soon after the Big Bang. There may be objects farther away than that, but we will never be able to see them because their light will never reach us.
|
| |
Previous:
Back
|
Book:
1001
|
Section:
Space
|
Chapter:
The Universe
|
|
|
|
 |
|
|
