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National Optical Astronomy Observatory Homepage
The National Optical Astronomy Observatory runs most of the big professional optical telescopes in the United States and this is their homepage. It includes information about the many facilities they run, some of the recent science...
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Kitt Peak National Observatory
Homepage of Kitt Peak National Observatory (KPNO) which is the one of the premier astronomical observatory used by professional astronomers in the United States. Although the site is mostly geared toward the professional, the Kitt Peak...