Pioneer anomaly and quintessence

AI Thread Summary
The discussion centers on the possibility that the Pioneer anomaly may be explained by quintessence, a theoretical form of dark energy. A referenced paper discusses Einstein's 1912 remarks about the speed of light being constant only in a flat gravitational reference frame. Participants express interest in exploring the implications of this perspective on the anomaly. The Renada paper is highlighted as a significant source for further investigation. Overall, the conversation emphasizes the need for deeper analysis of gravitational effects on light speed in relation to cosmic phenomena.
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Is the pioneer anomaly due to quintessence? I thought this was interesting
http://www.arxiv.org/PS_cache/gr-qc/pdf/0407/0407023.pdf
 
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You may find this interesting. The Renada paper cited in the above article, quoting Einstein (in 1912) invoking the constancy of the speed of light only in a gravitationally flat reference frame (no gradient in gravitational field strength). Got to find that paper next.

http://citebase.eprints.org/cgi-bin/citations?id=oai%3AarXiv%2Eorg%3Agr%2Dqc%2F0407023
 
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