The CMB rest frame is special for the CMB in the same way the rest frame of the sun is very interesting for the solar system.
I do not agree. CMB - expanding photon gas is in rest vs expanding Universe. So frame in rest in CMB is in rest in the Universe and defines absolute rest in Universe.
Answers seems so clear, and questions so simple. However if you think a little you would understand the problem and doubts of author of the question.
I can show that we have right to say that we are moving "away". Each reference frame has its origin. If we choose the reference frame which is in...
The interesting fact related to this question is the existence of the frame of absolute rest in our universe (which is in rest in CMB) in opposition to commonly presented statement, that all frames are equivalent and that there is no absolute rest and absolute movement. In every place in the...