# The kinematic origin of the cosmological redshift

@article{Bunn2009TheKO, title={The kinematic origin of the cosmological redshift}, author={Emory F. Bunn and David W. Hogg}, journal={American Journal of Physics}, year={2009}, volume={77}, pages={688-694} }

A common belief about big-bang cosmology is that the cosmological redshift cannot be properly viewed as a Doppler shift (that is, as evidence for a recession velocity) but must be viewed in terms of the stretching of space. We argue that, contrary to this view, the most natural interpretation of the redshift is as a Doppler shift, or rather as the accumulation of many infinitesimal Doppler shifts. The stretching-of-space interpretation obscures a central idea of relativity, namely that it is…

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