E6

E 6.1
Describe the distribution of galaxies in the universe


Define the term galactic cluster:

• A cluster of roughly a few hundred young stars in a loose distribution. Also called an open cluster. Source: Encyclopaedia.com

Source: http://www.physicscentral.com/explore/action/images/abell-cluster.jpg

Define the term galactic super-cluster:

• Superclusters are large groups of smaller galaxy groups and clusters and are among the largest structures of the cosmos. Source: en.wikipedia.org/wiki/Galactic_supercluster

Source: http://www.dragonslain.com/large_clusters.gif

E6.2

Explain the red-shift of light from different galaxies

Why are galaxies that are the furthest away red-shifted the most? :

• Because the universe is constantly expanding the the galaxies which are on the outer part of the big bang are moving away from the centre the fastest.