New X-ray detectors to provide unprecedented vision of the invisible universe

Very detailed information is now available from ultraviolet, optical, and submillimeter observations of the stellar, dust, and cold gas content of galaxies, and yet there is a dearth of understanding about the mechanisms that formed these galaxies. To truly understand how galaxies form, X-ray observations from high energy resolution imaging spectrometers are needed to see the cores of the galaxies themselves.