Stenocereus thurberi, the organpipe cactus, is a species of cactus native to Mexico and the United States. The species is found in rocky desert. Two subspecies are recognized based on their distribution and height. The Organ Pipe Cactus National Monument is named for the species. Its English common name is derived from its resemblance to a pipe organ.

In astronomy, the Pleiades , or Seven Sisters (M45), is an open star cluster containing middle-aged, hot B-type stars located in the constellation of Taurus. The cluster is dominated by hot blue and extremely luminous stars that have formed within the last 100 million years.

Organ Pipe Cactus National Monument is a U.S. National Monument and UNESCO biosphere reserve located in extreme southern Arizona which shares a border with the Mexican state of Sonora. The park is the only place in the United States where the Organ Pipe Cactus grows wild. Along with Organ Pipe, many other types of cacti, as well as other desert flora native to the Yuma Desert section of the Sonoran Desert region grow here. The Park is a beautiful preservation of the American Southwest.