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The COSETI Observatory

  • Detecting Extrasolar Planets.

    • Use a two dimensional array of PIN photodetectors. The image of star will fall on one pixel, the image of the extrasolar planet on another pixel.
    • Heterodyne detect the signals from each photodetector (pixel).
    • Use the doppler shift of spectral lines from light reflected or emitted (infrared) by extrasolar planet to increase discrimination (contrast) with the radiation from the star.

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