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In 2002, the Cassini spaceprobe, on its way to Saturn, passed close to the Sun as seen from the Earth (it was actually a long way from the Sun). Using the radio communications with Cassini, a stringent test of General Relativity was performed (a similar test had been done using the Viking lander on Mars, in 1979).
GR passed with flying colours.
This experiment shows GR to be valid to +/- ~5 x 10-5.
A popular account:
http://skyandtelescope.com/news/article_1066_1.asp
A preprint:
http://arxiv.org/PS_cache/gr-qc/pdf/0308/0308010.pdf
GR passed with flying colours.
This experiment shows GR to be valid to +/- ~5 x 10-5.
A popular account:
http://skyandtelescope.com/news/article_1066_1.asp
A preprint:
http://arxiv.org/PS_cache/gr-qc/pdf/0308/0308010.pdf
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