adaptive optics

First Light for a transformed Yepun

A major milestone has been reached in the project to transform Unit Telescope 4 (Yepun) of ESO’s Very Large Telescope (VLT) into a fully adaptive telescope, with the installation of a deformable secondary mirror on…


Light sabers from Paranal

On 26 April 2016 an event at ESO’s Paranal Observatory in Chile marked the brilliant first light for the four powerful lasers that form a crucial part of the adaptive optics systems on ESO’s Very…


Very, very, very, very close – yet separated

A team of astronomers from three institutions has developed a new type of telescope camera that makes higher resolution images than ever before, the culmination of 20 years of effort. The team has been developing…


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ESO from Dusk to Dawn

ESOCast 50 is a tour through a night of observation in Chile. You can see the laser beams shooting into the sky from the telescope domes. These laser beams excite sodium atoms at about 90…