, Volume 46, Issue 5, pp 1424-1430
Date: 17 Jan 2007

Moving Observers in an Isotropic Universe

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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.