Kitt Peak National Observatory (KPNO) is a Program of the NOIRLab. KPNO hosts the facilities of consortia that, between them, operate more than a dozen optical telescopes and two radio telescopes.
KPNO operates the Nicholas U. Mayall 4-meter Telescope on behalf of the Dark Energy Spectroscopic Instrument (DESI) survey (a project led by the US Department of Energy Office of Science) and the WIYN 3.5 meter Telescope (a partnership between Indiana University, the University of Wisconsin, Pennsylvania State University, the University of Missouri-Columbia, Purdue University, the NSF and NASA).
Established in 1964 and in its sixth decade of operations, the Kitt Peak Visitor Center has been enjoyed by more than two million people. Our guests experience the largest and most diverse collection of research telescopes in any one place in the world. Three of the nearly two dozen active telescopes on Kitt Peak are dedicated solely to public viewing in our world-renowned nightly stargazing programs.
