Thread: ELT 2nd-ary mirror!
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Old 24-05-2017, 02:24 PM
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sil (Steve)
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Join Date: Jun 2012
Location: Canberra
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Quote:
Originally Posted by julianh72 View Post
And then of course, there's the tertiary, the quaternary and the quintary(?) mirrors - this baby uses a 5-mirror design!
How many decades of constant cloud cover would this toy attract?
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