Cosmic Microwave Background

[db1uover]

Is the CMBR distinguished by a particular set of spectrometry signatures? If not, how is it differentiated?

[cepheid]

Is the CMBR distinguished by a particular set of spectrometry signatures? If not, how is it differentiated?

Basically yeah. There aren't any other sources of radiation in the sky that come at you from all directions, and appear smooth and uniform to one part in 105. There also aren't any other sources whose spectra appear to be that of a nearly perfect 3 kelvin blackbody. (The spectrum is one of the most perfect examples of a blackbody spectrum in nature).

[mreq]

Question. I read the the CMBR is increasing then decreasing trough constelations by the move of the earth. Is this the same for all the planets ?