ELT: the world’s biggest eye on the sky.

ESO, the European Organisation for Astronomical Research in the Southern Hemisphere, is constructing the world’s largest infrared observatory in Chile. It will house the ELT, Extremely Large Telescope, composed of 5 mirrors of different sizes and forms. The main or primary mirror, which is 39 meters in diameter, will capture the light from the night sky and reflect it onto the other mirrors which in turn will transmit it to instruments that will visualize the images.

The ELT will be operational as of 2025, advancing astrophysical knowledge and studying exoplanets, the farthest galaxies and supermassive black holes.