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Physics Research International
Volume 2012 (2012), Article ID 469095, 12 pages
Research Article

Conformal Cosmology and the Pioneer Anomaly

Department of Physics, Loyola Marymount University, Los Angeles, CA 90045, USA

Received 9 August 2011; Revised 9 October 2011; Accepted 10 October 2011

Academic Editor: A. Beesham

Copyright © 2012 Gabriele U. Varieschi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We review the fundamental results of a new cosmological model, based on conformal gravity, and apply them to the analysis of the early data of the Pioneer anomaly. We show that our conformal cosmology can naturally explain the anomalous acceleration of the Pioneer 10 and 11 spacecrafts, in terms of a local blueshift region extending around the solar system and therefore affecting the frequencies of the navigational radio signals exchanged between Earth and the spacecraft. By using our model, we explain the numerical coincidence between the value of the anomalous acceleration and the Hubble constant at the present epoch and also confirm our previous determination of the cosmological parameters and . New Pioneer data are expected to be publicly available in the near future, which might enable more precise evaluations of these parameters.