https://mic.com/articles/178367/is-this-telescope-big-enough-to-find-alien-life?tse_id=INF_066c22304ab711e780b645b806a7020f&utm_campaign=WHFacebook&utm_content=inf_256_285_2&utm_medium=referral&utm_source=policymicFB#.p59nEu4wZ The ELT will gather 100,000,000 times more light than the human eye, 8,000,000 times more than Galileo's telescope, and 26 times more than a single VLT Unit Telescope. In fact, the ELT will gather more light than all of the existing 8–10-metre class telescopes on the planet, combined. via Is the Extremely Large Telescope big enough to find alien life?.