An extremely large telescope (ELT) is an astronomical observatory featuring a telescope with an aperture of more than 20 m diameter, when discussing reflecting telescopes of optical wavelengths including ultraviolet (UV), visible, and near infrared wavelengths. Among many planned capabilities, ELTs are planned to increase the chance of finding Earth-like planets around other stars.
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The next generation of telescopes could soon allow astronomers to examine worlds orbiting dead stars for signs of life. Planets ...