Abstract
This paper considers how the motion of an observer in an isotropic universe may be determined by measurements. This provides a means to identify inertial frames, yielding a simple resolution to the twins paradox of relativity theory in such a universe. We propose that isotropy is a requirement for a frame to be inertial; this makes it possible to relate motion to the large scale structure of the universe.
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Kak, S. Moving Observers in an Isotropic Universe. Int J Theor Phys 46, 1424–1430 (2007). https://doi.org/10.1007/s10773-006-9281-2
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DOI: https://doi.org/10.1007/s10773-006-9281-2