X-Ray Imaging and Spectroscopy Mission

The X-Ray Imaging and Spectroscopy Mission (XRISM, pronounced 'crism' or 'krizz-em', as if the X was a chi), is an X-ray space telescope. It is a mission of the Japan Aerospace Exploration Agency (JAXA) in partnership with NASA and ESA, intended to study galaxy clusters, outflows from galaxy nuclei, and dark matter.