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.
Date has moved, per the pin description: "…. A 30-metre segmented-mirror telescope stalled for a decade by opposition to building on Mauna Kea,…"
The National Science Foundation's own page states NSF extended its environmental review of the Thirty Meter Telescope (a required step before any Mauna Kea vs. La Palma site decision) to conclude by 31 December 2026, a concrete near-term deadline closer than the pin's stored June 2027 date.
Honolulu Civil Beat reports the same NSF[2] and University of Hawaii timeline: environmental review through end of 2026, with Mauna Kea management needing to finalize which observatories continue by January 2027, corroborating the decision-timeline pressure the pin describes.
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.
