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Data is collected using the Catalina Schmidt telescope on Mount Bigelow.

The images and data for over 200 million celestial bodies — from stars to supernovas — are now available to the public thanks to the work of astronomers from the University of Arizona and the California Institute of Technology. Read more»

No snow? No problem for three Arizona ski resorts on federal land that will now have an easier time operating slopeside activities year-round. President Obama on Monday signed a law making it easier for such facilities to operate in the summer — activities such as mountain biking and disc golf — without having to go through extensive paperwork first. Read more» 1

Drivers making their way up the Catalina Highway to Summerhaven on Friday were reminded on the danger of wildfires.

Although a brush fire on Mount Lemmon was extinguished quickly Friday, many of the residents of Summerhaven remain on edge. Most of the mountain is closed because of the high risk of wildfires. Read more»

Parts of Sabino Canyon remain open, despite the closing of the Coronado National Forest because of the fire danger. The Catalina Highway is open to visitors to Summerhaven and Ski Valley, but most of Mount Lemmon is closed. Read more»

The Wallow Fire near Nutrioso, June 4.

Sabino Canyon, Mount Lemmon and the Coronado National Forest will be closed due to extreme fire risks in Southern Arizona. The Wallow Fire, burning in Eastern Arizona, is now the second-largest in state history at more than 311,000 acres. Read more»

Oh, boy! With the sun shining and at least a foot of fresh snow on Mount Lemmon, Wednesday looked like a perfect opportunity to beat the rodeo rush and snatch a day of skiing from the jaws of the Sonoran Desert. Read more»

Catalina Highway on Mount Lemmon is closed to all but residents at milepost 14, says the Pima County Sheriff's Department. Read more»