(Reuters) - A telescope that will be the world's largest when completed could face a delay to start-up as its European backers wait for Brazil to commit to the funding needed for it to be fully operational.
The European Extremely Large Telescope (E-ELT) will have a primary mirror 39 meters (43 yards) in diameter, allowing it to gather around 15 times more light than the largest optical telescopes now functioning.
The tip of a mountain high in the Chilean desert was removed in June so site clearance could get under way, with the telescope slated to reach "first light" in 2024.
But that could now be delayed until 2026, said its operators the European Southern Observatory (ESO) on Thursday.
Full funding of construction is dependent on Brazil becoming the first non-European country to join the ESO, but that has not yet happened. The process is under way but still needs to gain congressional approval in Brazil, where support for it has been patchy.
"It became clear by mid-2014 that the ongoing day-to-day delay was posing an increasing risk to the project and to the scientific aspirations of the ESO community," said the ESO in a report of a meeting its council held this week.
