An observatory founded in 2016 at an altitude of 5200 m on the Chajnantor plateau of the Atacama Desert, northern Chile. It is owned and operated by Princeton University, the University of California at San Diego, the University of California at Berkeley, the University of Pennsylvania, and the Lawrence Berkeley National Laboratory, with additional funding from the Simons Foundation of New York. Its initial instruments are the Atacama Cosmology Telescope (ACT) and the Simons Array, a trio of 3.5-m millimetre-wave telescopes for studying the cosmic microwave background. Future telescopes will include a fourth-generation cosmic microwave background array, CMB-S4, due to come into operation in 2021.

http://www.simonsobservatory.org Official Simons Observatory website.