The Simons Observatory is a new astronomy facility in Chile’s Atacama Desert that will merge and expand existing efforts to explore the evolution of the universe from its earliest moments to today. The project, which draws collaborators from 30 institutions worldwide, was made possible by awards from Simons Foundation and Heising-Simons Foundation. You can read more about these awards here.
POLARBEAR is a Cosmic Microwave Background (CMB) polarization experiment targeted at measuring both the signature of gravitational lensing at arcminute scales and the signature of cosmic inflation at degree scales. POLARBEAR has been observing from the Atacama Desert in Northern Chile since 2011.
The ACT telescope. The 6 meter diameter telescope has a ground screen that moves with the telescope as well as a large fixed ground screen. The volcano Licancabur (19,423’) is in the background. (Photo: Mark Devlin)