The tumultuous heart of our Galaxy captured by ESA’s XMM-Newton X-ray observatory esa.int/Our_Activities… via @esa http://t.co/j3fJtaRcCt

The tumultuous heart of our Galaxy captured by ESA’s XMM-Newton X-ray observatory esa.int/Our_Activities… via @esa http://t.co/j3fJtaRcCt
