According to Albert Einstein;
" every motion is relative in inertial frame of reference or non-accelerating frame of reference "
how we can define the motion of Universe in terms of relative motion?

Question

According to Albert Einstein;
 " every motion is relative in inertial frame of reference or non-accelerating frame of reference "
how we can define the motion of Universe  in terms of relative motion?

anonymous · Answer

we can define the motion of the universe with reference to our galaxy