Which desert is the driest non-polar desert on Earth?

The Atacama Desert in northern Chile is widely considered the driest non-polar desert on Earth. Some weather stations in the core of the desert have recorded decades with almost no measurable rainfall. Its extreme dryness is caused by a combination of factors, including cold ocean currents, the rain shadow of the Andes, and persistent high-pressure systems. As a result, the landscape can resemble Mars in its barrenness. The Atacama is also a major site for astronomy because of its clear skies and dry air.