THIS WEEK IN SCIENCE
• weeklyscience.comAstronomers using ESA’s XMM-Newton X-ray observatory have discovered, for the first time, a pair of supermassive black holes in orbit around one another in an ordinary galaxy.
Astronomers using ESA’s XMM-Newton X-ray observatory have discovered, for the first time, a pair of supermassive black holes in orbit around one another in an ordinary galaxy.
