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Lucky imaging
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== Explanation == Images taken with ground-based [[telescope]]s are subject to the blurring effect of atmospheric turbulence (seen to the eye as the stars [[twinkling]]). Many astronomical imaging programs require higher resolution than is possible without some correction of the images. Lucky imaging is one of several methods used to remove atmospheric blurring. Used at a 1% selection or less, lucky imaging can reach the [[diffraction limit]] of even 2.5 m aperture telescopes, a resolution improvement factor of at least five over standard imaging systems. <gallery> File:zboo lucky image 1pc.png|[[Zeta Bootis]] imaged with the [[Nordic Optical Telescope]] on 13 May 2000 using the lucky imaging method. (The [[Airy disc]]s around the stars are [[diffraction]] from the 2.56 m telescope aperture.) File:Zeta bootis short exposure.png|Typical short-exposure image of this binary star from the same dataset, but without using any [[speckle imaging|speckle]] processing. The effect of the Earth's atmosphere is to break the image of each star up into speckles. </gallery>
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