Luminous Landscape Forum

The Art of Photography => The Coffee Corner => Topic started by: Robert Roaldi on February 15, 2018, 07:49:57 am

Title: How to build a big mirror for an observatory
Post by: Robert Roaldi on February 15, 2018, 07:49:57 am

Longish article and video: http://theconversation.com/how-do-you-build-a-mirror-for-one-of-the-worlds-biggest-telescopes-49927 (http://theconversation.com/how-do-you-build-a-mirror-for-one-of-the-worlds-biggest-telescopes-49927).

Title: Re: How to build a big mirror for an observatory
Post by: PeterAit on February 21, 2018, 10:24:06 am

Quote from: Robert Roaldi on February 15, 2018, 07:49:57 am

Longish article and video: http://theconversation.com/how-do-you-build-a-mirror-for-one-of-the-worlds-biggest-telescopes-49927 (http://theconversation.com/how-do-you-build-a-mirror-for-one-of-the-worlds-biggest-telescopes-49927).

Thank you! That's a fascinating article.

Title: Re: How to build a big mirror for an observatory
Post by: Alan Goldhammer on February 28, 2018, 08:38:15 am

Thanks for the link.  Back in the day all the school children in San Diego went on field trips up to the Mount Palomar observatory to see the Hale Telescope which at the time was the largest in the world.  We were told about all the effort it took to cast the mirror, transport and polish it as it moved from Corning NY to Los Angeles and then on to San Diego for mounting.  https://en.wikipedia.org/wiki/Hale_Telescope