RBI Grade B Officers 2017 jun Paper

(5) Construction began inChile on the European ExtremelyLarge Telescope on 26May 2017, which when completedwill be the world’s largestoptical telescope, some fivetimes larger than the top observinginstruments in use today.Located on a 3,000-meter-high mountain in themiddle of the Atacama Desert,it is due to begin operating in2024.