Re-aluminizing the Palomar 200" mirror
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Uploaded by palomarskyguy on Sep 30, 2006
Time-lapse movie of re-aluminizing the 14.5 ton 200-inch mirror at Palomar Observatory.
Uploader Comments (palomarskyguy)
Top Comments
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Hey, directed here from TF's video. You'll probably get a lot like me, hope it doesn't annoy you. Just checking out any other vids you may have on this topic. :)
2 years ago 4
All Comments (39)
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I know this video is 5 years old and I could get this info somewhere else, so for that, i apologize. I'm assuming that is a vacuum deposition system? Do you have to polish/normalize the mirror after that process or is it ready to go out of the oven?
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Al encuentro con dios otra vez!
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@kwanyx "s silver better (more reflective) than aluminum? Is aluminum used due to cost of silver?"
Silver also oxidises and of coarse costs quite a bit more. The only other option would be something like one of the platinum metals, and that would cost an absolute fortune. It's probably cheaper to just give it a bath and some new aluminium every year to year and half than it would be to do the platinum once.
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GOSTO MUITO DE ASTRONOMIA!!!!
MÁS ESTE VIDEO É MUITO DEMORADO E POUCO EXPLICATIVO PARA NÓS MEROS MORTAIS!!!!!UM PENA!!
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@TheRedneckAtheist yup, its all about attention to detail ...
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Прикольненько
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Прикольненько :)
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Mankinds eye into the vastness of space. Glad to have lived and seen the images it captured.
Azzy
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The mirror's inner structure is very impressive, after removing the coating.
Well done, outstanding upload.
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good size mirror : )
must be possible to make it much lighter than that though and still as rigid
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Yes, all of the work is done in the dome, by the Palomar staff.
palomarskyguy 1 year ago
I would like to why this procedure is necessary, the only thing that comes to mind is oxidation.
Awesome video, it shows unedumecated rednecks like me that science is hard freakin' work.
TheRedneckAtheist 2 years ago 2
The mirror simply gets dirty from use over 300 nights per year. Also, a little bit of moisture and the wrong kind of dirt can form a mild acid which etches off the thin coating of aluminum.
palomarskyguy 2 years ago
If you check your comments, how often is the mirror re-aluminized like this?
prodigyat9 2 years ago
Every 18 - 24 months or so.
palomarskyguy 2 years ago