Pioneer anomaly and quintessence

[Chronos]

Is the pioneer anomaly due to quintessence? I thought this was interesting
http://www.arxiv.org/PS_cache/gr-qc/pdf/0407/0407023.pdf

[turbo]

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