extremely large telescope

extremely large telescope is a optical telescope or telescope.

Also recorded as ELT.

Overview

Catalogue entries for instruments state maker, signature, completeness and working condition. VALÉORINE records this subject so that lots referring to it can be described consistently.

In detail

astronomical observatory featuring an optical telescope with an aperture of more than 20 m diameter

Sources

Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.

reference work · Reputable secondary · Wikipedia
“Extremely large telescope”, English Wikipedia, consulted as further reading
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reference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q2665569: extremely large telescope
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