Does the pattern of the CMB change?

[Sanborn Chase]

Is the pattern of temperature variation of the cosmic microwave background static, or does it vary over time?

 

[Gigaz]

It varies with time. First of all, you have a slow increase of the wave length with time. Second, you have the pattern. This will vary in time just like it varies in space in a sense that when typical structural patterns are 10 Megalightyears in size, they will also change on a time scale of 10 million years.

 

[Sanborn Chase]

Excellent! Thank you very much.