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Remake of telescope mirror on display at Corning Glass Museum

The Hubble isn't the first telescope to suffer a defective mirror in its early days.  When the giant observatory on Palomar Mountain was built, back in the 1940s, its first mirror had a crack.  Another one was made.  The first mirror is now on display at the Corning Museum of Glass in upstate New York.  Seen during my second bicycle trip across USA.

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