To what extent does the CMBR vary over time ? If I have understood it correctly the intensity variations in the map, are due to the fact that some of this energy turned into matter in the early universe. So in a sense, the CMBR displays what the early universe looked like, correct ? .. roughly anyway ... If this is true, then this intensity distribution should be pretty static, right ? So if this sort of map is produced again in a couple of years, it should look basically the same, am I right ? Has this comparison already been made perhaps ?