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<p>This article on ESA's site</p><p>http://www.esa.int/esaCP/SEMSIFXIPIF_index_0.html</p><p>The CoRoT team has discovered a Jupiter transiting a star with a 9-day period, that they observed over several months.</p><p>But the strange thing about their analysis is that "the team has found that the star, which is slightly larger than our Sun, is rotating at the same pace as the planet's period of revolution. " That would mean a DOUBLE tidal locking, Pluto-Charon style... A first for a star-planet duo.</p><p>The rotation period of the planet has been determined by comparative photometry.</p>