Three Fathoms Observatory
Stewart Yeung








                                                                                                                                                                                               Studies of Physics

Reconstructive Speckle Imaging by Gemini North Telescop (28 September 2012)






The 8-meter Gemini North telescope (Hawaii) combined with “reconstructive speckle imaging” techniques took the sharpest ground-based photo ever obtained of Pluto and Charon in visible light.

The observatory first obtained a large number of 60 milliseconds “snapshots” of Pluto and Charon. These snapshots were then reconstructed into a single image after subtracting the blurring effects and ever-changing speckled artifacts caused by turbulence in the atmosphere and other optical aberrations. With enough snapshots only the light from the actual objects remains constant while the transient artifacts cancel each other out.

This state-of-the-art tool (large telescope + advanced techniques) has enhanced our vision when exploring exoplanets.