'The 200-inch mirror of the Hale Telescope on this California peak took some 10 months to cool after casting'
Mt. Palomar
ASTRONOMY: The 200-inch mirror of the Hale Telescope on this California peak took some 10 months to cool after casting
The 200-inch mirror of the Hale Telescope on this California peak took some 10 months to cool after casting
The 200-inch mirror of the Hale Telescope on this California peak took some 10 months to cool after casting
ASTRONOMY
Mt. Palomar
ASTRONOMY