4 ms·

Resurfacing is an operating cost it needs to be done periodically.

• ars 3y ago
  I'm going to need some more info on that, because that doesn't sound right to me. There's no way they are regrinding and resurfacing the mirror periodically - cleaning, sure. But redoing the surface? I'd like to see more info please.
  • dylan604 3y ago
    Just go watch the referenced link. It is a very informative video. It's only the top response of this whole thread, but just to make it convenient[0]. I can only lead you to water. I can't make you drink it. Continuing to refute it after that just let's us know exactly what you're about [0]https://news.ycombinator.com/item?id=38092084 https://news.ycombinator.com/item?id=38092084
    • ars 3y ago
      As requested, I drank, and I saw the part about them refinishing the top surface layer. As I suspected it was not them redoing the glass, rather removing the aluminum and redepositing it. The perfectly shaped glass is the expensive part - coating it is not the expensive part. So despite drinking, I did not get my answer on how this telescope costs $100million a year to operate.