Facilities and Experiments

Experiments at the Cosmic Frontier

Project Status: Operating

Sloan Digital Sky Survey

The Sloan Digital Sky Survey is the most ambitious astronomical survey ever undertaken. When completed, it will provide detailed optical images covering more than a quarter of the sky and a three-dimensional map of roughly one million galaxies and quasars. As the survey progresses, the data are released to the scientific community and the general public in annual increments.