第一项始终是图钉的来源。总体可信度是各份资料对上方所用开始和结束时间支持程度的加权平均;资料每比最新的一份旧 180 天,权重减半。
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.
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