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Nature 421, 507-509 (30 January 2003) | doi:10.1038/nature01379;

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An extrasolar planet that transits the disk of its parent star

Planets orbiting other stars could in principle be found through the periodic dimming of starlight as a planet moves across—or |[lsquo]|transits|[rsquo]|—the line of sight between the observer and the star. Depending on the size of the planet relative to the star, the dimming could reach a few per cent of the apparent brightness of the star.

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