Talk:Hale Telescope

message: Forty plus years ago I read the educational comic book about the Palomar Observatory and the Hale Telescope.  They told about the first attempt at making the mirror, which was the biggest piece of glass Corning had ever made.  The heat of the big pot of glass was so hot that the ceiling was damaged and two bricks fell into the mix.  A friend of mine saw this piece of glass in Corning about 15 years ago, and she said it looks perfectly clear, but the astronomers rejected it, so a second glass blank was made and shipped to California.  This should be in the article.   Randall Bart    Talk   00:36, 7 April 2009 (UTC)
replies: text: Since it's a mirror clarity isn't a concern, just dimensional stability.  In any case, the story is true and here's a source:    Will Beback  talk   07:40, 7 April 2009 (UTC)

text: I went ahead and added a bit about the mirror and also about the coating process. GFee free to revise and improve.   Will Beback  talk   08:05, 7 April 2009 (UTC)
replies: text: Great addition. --ChetvornoTALK 04:56, 9 April 2009 (UTC)
thread_title: Mirror

message: Please could somebody add information about important discoveries that have been made primarily with this telescope? Thank you.—RJH (talk) 16:35, 8 October 2009 (UTC)
thread_title:  Discoveries 

message: Consolidated material about the mirror into section and expanded. Deleted the second paragraph since it is wrong about the 200 inch being the 2 largest single mirror, its about the 8th largest according to List of largest optical reflecting telescopes. The rest of the paragraph is unref'ed and more overall descriptive of large mirrors in general than about the 200 inch. It could be added to Reflecting telescope or some other article dealing with large mirrors. Fountains of Bryn Mawr (talk) 17:10, 23 October 2009 (UTC)
replies: text: Yes, the section should have said that the Hale and BTA-6 are the largest telescopes in the world with traditional rigid mirrors.   It is correct that there are about 8 telescopes with larger single mirrors.  As the deleted text explained, these larger mirrors are too big to hold their shape as they are rotated, so their shape is controlled by moveable mounts with complicated computer controlled actuators that compensate for the sagging of the mirror as it is turned.  These are essentially flexible mirrors.  The Hale and the BTA-6 are notable as the largest telescopes with rigid mirrors that don't require dynamic computer figure correction.  However, as you say the material was unsourced.  I'll try to find sources.  --ChetvornoTALK 04:30, 24 October 2009 (UTC)
replies: text: Restored deleted paragraph with supporting citations.  --ChetvornoTALK 10:26, 11 November 2009 (UTC)
thread_title: Mirror redux

message: It should be said why the star itself is not in the photograph.  — Preceding unsigned comment added by 109.153.143.86 (talk) 14:54, 24 August 2017 (UTC)
thread_title:  HR8799 

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thread_title:  External links modified 

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thread_title:  External links modified (January 2018) 

message: This section, as of February 2022, appears to have two problems.  It's missing most of the major discoveries (see this list from the builders of Hale) while containing an assortment of references to relatively minor discoveries.   I think this should be cleaned up.  The paper THE FIRST 50 YEARS AT PALOMAR: 1949–1999 The Early Years of Stellar Evolution, Cosmology, and High-Energy Astrophysics would form an excellent basis for discoveries up to 1999.  LouScheffer (talk) 13:32, 12 February 2022 (UTC)
thread_title:  Observations and research