Also the ELT (claimed to be operational starting in 2025) [1] will already allow study of the atmospheric composition of extrasolar planets (I guess that means

Also the ELT (claimed to be operational starting in 2025) [1] will already allow study of the atmospheric composition of extrasolar planets (I guess that means spectroscopy). [1] https://en.wikipedia.org/wiki/Extremely_Large_Telescope https://en.wikipedia.org/wiki/Extremely_Large_Telescope