X-ray: (NASA/CXO/University College London/W. Dunn et al; Optical: W.M. Keck Observatory)
Home X-ray: (NASA/CXO/University College London/W. Dunn et al; Optical: W.M. Keck Observatory) X-ray: (NASA/CXO/University College London/W. Dunn et al; Optical: W.M. Keck Observatory)