During its two-year mission, SPHEREx will use a highly advanced imager to map the entire sky four times with unprecedented detail, creating the highest-resolution color maps of the universe. It will collect data on over 450 million galaxies and millions of stars, contributing to the study of cosmic expansion since the Big Bang, the evolution of ancient galaxies, and the role of water and other life-sustaining elements in planetary development.

"SPHEREx will allow us to look back into the early universe and provide new insights into how and why it came to be as it is," explained Alberto Conti, vice president and general manager of BAE Systems Space and Mission Systems. "We're excited to help uncover these enduring mysteries and to continue our long-standing support of NASA's astrophysics missions."

In addition to its core science objectives, SPHEREx will assist in identifying promising targets for in-depth study by missions like the James Webb Space Telescope and support preparations for future projects such as the Nancy Grace Roman Space Telescope.

BAE Systems' role includes developing the satellite bus and constructing the mission's telescope and cover, while Caltech and NASA's Jet Propulsion Laboratory provided the remaining instrument components. Dr. Jamie Bock of Caltech serves as the mission's principal investigator.

BAE Systems also led the integration and environmental testing program for the observatory. This rigorous process involved thermal vacuum tests to replicate space conditions, vibration and acoustic tests to simulate launch stresses, and electromagnetic interference tests to ensure robust performance against electrical disruptions. With testing successfully concluded, the observatory is now undergoing final preparations for shipment and launch.

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