Does the expansion of spacetime contribute to the Doppler effect?

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Offline thedoc

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Geoff Dumas asked the Naked Scientists:
   We understand that the universe is expanding as explained by redshifted distant galaxies; the further from us, the more redshifted. Do we know that there is no contribution to the redshift from the expansion of spacetime itself? Couldn't this also increase the wavelength of emitted light as seen by us?
What do you think?
« Last Edit: 07/12/2015 10:50:02 by _system »


Offline Space Flow

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Yes, Geoff Dumas. You are right.
The expansion of spacetime is exactly what we consider to be the cause of the redshift described.
We are made of Spacetime; with a sprinkling of Stardust.
Matter tells Spacetime how to Flow; Spacetime tells matter where to go