Shiprock is a beautiful rock formation, rising some 1,583 feet (483 meters) above the high-desert plain of the Navajo Nation in San Juan County, New Mexico.
Circumzenithal arcs look like upside-down rainbows, but they're caused by ice crystals, not rain. They're sometimes seen with sundogs, and even full halos around the sun or moon.
Many people recognize the Big Dipper in the northern sky. Here are 10 deep-sky Messier objects - 8 galaxies, a planetary nebula, and a double star - in and around the Big Dipper.