Published:
March 28, 2011
 The light curve of an exoplanet transiting its star (top) is different from that of a starspot traversing a star’s disk, so astronomers can tell the two signals apart. Astronomy: Roen Kelly Thus we can distinguish a transit by the short duration of the dip. ... so the dip of a transit is slightly “U-shaped.” The shape of the starspot dip has gentle sides and looks more “V-shaped.”
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