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ELT 2nd-ary mirror!
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24-05-2017, 01:03 PM
julianh72
(Julian)
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Join Date: Jan 2014
Location: Kelvin Grove
Posts: 1,300
Interestingly, the 4.2 metre secondary mirror is significantly bigger than the segments making up the primary (they're "only" 1.4 metres across - but there are a LOT of them - 798, to be precise).
https://www.eso.org/public/teles-instr/elt/elt_num/
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