Aerial photo of Kitt Peak on Jan 31, ... stars that are visible at sunset as they listen to him at the 16 inch telescope with its roll-off roof at the top of Kitt Peak National Observatory in 2009.

Aerial photo of Kitt Peak on Jan 31, ... Kitt Peak National Observatory is open to the public from 9 a.m. to 4 p.m. every day to visitors not participating in a nighttime program.

Kitt Peak National Observatory, a a program of the National Science Foundation's NOIRLab, hosts the recently retired McMath-Pierce Solar Telescope. According to NOIRLab , the solar telescope ...

Kitt Peak National Observatory, a a program of the National Science Foundation's NOIRLab, hosts the recently retired McMath-Pierce Solar Telescope. According to NOIRLab , the solar telescope ...

For the first time, the seasonal peak of carbon dioxide concentrations in the atmosphere exceeded 430 parts per million (ppm) at NOAA’s Mauna Loa Observatory on Hawaii, scientists from NOAA and ...

This image was taken by telescope from Kitt Peak National Observatory near Tucson, Arizona. Photograph courtesy T. Rector (University of Alaska Anchorage), Z. Levay and L. Frattare ...

Astronomy has lost one of its most assiduous calculators of eclipses with the passing of astronomer Fred Espenak, known widely as "Mr. Eclipse." ...

An observatory high on Hawaii's Mauna Loa volcano that measures carbon dioxide in the atmosphere has reported its highest ever seasonal peak concentration of the greenhouse gas. For the first time ...

Fred Espenak, an astrophysicist that Astronomy magazine dubbed "Earth's premiere authority on solar eclipses," died Sunday, June 1, at his home in Portal, Arizona. He was 71 years old.

The night sky viewing program at Kitt Peak National Observatory. Photograph by Greg Dale, Nat Geo Image Collection. The Milky Way over the Kitt Peak National Observatory in Arizona.