Close-up View of Neutron Star Mission's X-Ray Concentrator Optics

A new NASA mission, the Neutron Star Interior Composition Explorer (NICER), is headed for the International Space Station to observe one of the strangest observable objects in the universe. In this photo, NICER’s X-ray concentrator optics are inspected for dust and foreign object debris that could impair functionality once in space. via NASA http://ift.tt/2qjUVZp