
A Ball Aerospace engineer checks out the Imaging X-Ray Polarimetry Explorer spacecraft at Ball test facilities in Boulder, Colorado.

The Imaging X-Ray Polarimetry Explorer team prepares the spacecraft for testing at Ball Aerospace facilities in Boulder, Colorado.

The Imaging X-Ray Polarimetry Explorer spacecraft array, undergoing testing and integration at Ball Aerospace test facilities in Boulder, Colorado. A…

Air Force Major William J. “Pete” Knight in his full-pressure flight suit, kneeling in front of X-15 no. 2 on…

Christopher Kraft, flight director during Project Mercury, works at his console inside the Flight Control area at Mercury Mission Control.

A Ball Aerospace engineer prepares the Imaging X-Ray Polarimetry Explorer spacecraft boom for testing at Ball’s Boulder, Colorado, test facility.…

The Imaging X-Ray Polarimetry Explorer spacecraft stands fully integrated and cleared to fly at Ball Aerospace test facilities in Boulder,…

The Imaging X-Ray Polarimetry Explorer spacecraft stands fully integrated and cleared to fly at Ball Aerospace test facilities in Boulder,…

NASA’s Curiosity Mars rover used its black-and-white navigation cameras to capture panoramas of this scene at two times of day…

The Imaging X-Ray Polarimetry Explorer spacecraft stands fully integrated and cleared to fly at Ball Aerospace test facilities in Boulder,…