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Here is a 2013 Nature News article describing his theory:

https://www.nature.com/news/cosmologist-claims-universe-may-not-be-expanding-1.13379

Here is his 2013 paper "A Universe without expansion":

https://arxiv.org/abs/1303.6878

He proposes that space is static but that all masses in the Universe grow due to interaction with the scalar "cosmon" field. This causes all atomic length scales to shrink with the Universal scale factor. Thus the expansion of the Universe is an apparent effect.

I was wondering if the theory could be tested in the following way:-

Consider a pair of satellites orbiting Earth separated by a small distance ##d## of say ##100## meters.

Assume both satellites use laser range-finding technology to continually measure the distance ##d## and send the data back to Earth.

If atomic scales are shrinking then the apparent measured value of ##d## should increase with the universal scale factor. After a year the change would be about ##10^{-8}## meters which should be easily detectable.

Would this work?