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View Diary: Kepler Rises (134 comments)

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  •  Won't be for a while (2+ / 0-)

    First, one can get false positives. Say you have two stars orbiting one another and their orbits are aligned so that from Earth, one star just overlaps the edge of the other. Then once each orbit, one will see  a slight drop in light
    that in depth and duration will look like an exoplanet transit.

    To check, one will then see if the star shows evidence for "wobbling" or more accurately called changes in radial velocity. see here for a good explanation
    The less "wobbling" there is, the more likely one has a true transit and not a false positive because a planet would effect the motion of the star much less than another star. This means observing the star multiple times and so I doubt there will be any announcements in the first few months of operations.  

    H.L. Mencken: "A nation of sheep begets a government of wolves"

    by igneous on Sun Mar 08, 2009 at 07:55:01 AM PDT

    [ Parent ]

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