A view inside the Hale dome. A massive telescope is pointed directly up, with the dome closed. Various stairs and ladders around the picture provide a sense of scale -- this is a massive facility.

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1. Thomas Connor (thomasconnor@mstdn.social)'s status on Monday, 30-May-2022 08:00:48 UTC Thomas Connor

   in reply to

   As I said, tonight I'm on the 200-inch (that's the diameter of the primary mirror) telescope on Palomar mountain in southern California. The Hale telescope, to use its proper name, was once the largest optical telescope in the world. It's also a giant, in a way that even larger, modern telescopes are not. Nowadays, we can stack some pretty impressive telescopes in relatively smaller domes, but construction of this started before WWII. It is, in some ways, the last of the Telescope Battleships.

   First light occurred in 1949. But in June, 1948 there was a large dedication ceremony. Photos from that event really drive home just how freakin' big the whole thing is.