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Old Saturday 4th November 2017, 04:19   #1
Chosun Juan
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Join Date: Dec 2010
Location: Central West NSW, Australia
Posts: 3,486
Lightbulb Giant Magellan Telescope

I thought I would post this out of interest and figured this would be about the best place, but hoping plenty of those weird binoworld folk see it too, since they are always talking about this lens/mirror coating or that .......... (best Crocodile Dundee voice) that's not a mirror - this is a mirror!

This is the 5th of 7, 8.4m diameter separate mirrors that will go to make up the 24.5m (80ft) primary mirror of the GMT. Surface finish tolerance of 20nm -- which is something like the thickness of a credit card in the middle of 25 football pitches !!!
https://www.space.com/38652-giant-ma...r-casting.html

When the 7 are finished and put together ~2025, it will have 10 times the resolving power of the Hubble Telescope.

https://en.m.wikipedia.org/wiki/Gian...llan_Telescope



Chosun

Last edited by Chosun Juan : Saturday 4th November 2017 at 09:56.
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