The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Given as a target, not a fixed date, per en.wikipedia.org: "…and construction in July 2023, with the expected completion and first light set for March 2029.[13][…"
The page could not be fetched, but ESO's[3] own headline, "Telescope first light for ESO's Extremely Large Telescope now planned for March 2029," published March 22, 2025, directly matches the pin's stored date and title.
ESO's[2] ELT timeline page confirms "the ELT is set to make its first test observations in 2029," with scientific first light following in December 2030, matching the pin's stored March 2029 date for telescope first light.
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.
