I have a slightly related question. Because we are basically seeing back in time, the net velocity of the CMB is basically the same as the net velocity of the big bang, right? However, by conservation of momentum, we know that the velocity of the center of mass of any system is conserved. So it should be conserved from the big bang up until now. Thus, shouldn't our velocity with respect to the CMB match our velocity with respect to the velocity of the observable universe's center of mass? Does it?
nhammen t1_j29fv7h wrote
Reply to comment by DreamOfTheEndlessSky in How fast does the Milky Way spin? How far does Earth move through space in a year? by Sabre-Tooth-Monkey
I have a slightly related question. Because we are basically seeing back in time, the net velocity of the CMB is basically the same as the net velocity of the big bang, right? However, by conservation of momentum, we know that the velocity of the center of mass of any system is conserved. So it should be conserved from the big bang up until now. Thus, shouldn't our velocity with respect to the CMB match our velocity with respect to the velocity of the observable universe's center of mass? Does it?