Abstract

Universal invariance is shown to offer a plausible alternative to special relativity's conceptions of universal covariance, four-vectors, spacetime symmetry, etc. This alternative, supported by a conception of time similar to Newton's (here termed ?Collective Time? and patterned on GPS time) provides a mathematical basis particularly helpful in analyzing the many-body problem. Both particle mechanics and electromagnetism fit with this radically new way of formulating a relativistic description. A crucial experiment is advocated, requiring accurate measurement of stellar aberration to second order by means of the VLBI system.