Task: Text Categorization
Input (English): Using the X-ray telescopes Suzaku and XMM-Newton, scientists in 2012 detected the quasiperiodic oscillation associated with the increase in mass of one of these objects. Roy Kerr and Ted Newman solved general relativity equations to describe the behavior of these objects when they have angular momentum. A supermassive one at Sagittarius A is believed to be the center of the Milky Way galaxy. David Finkelstein demonstrated mathematically that these are surrounded by a region that, to an outside observer, can never be reached. The distance from the center of these objects to that region is named for Karl Schwarzschild, and that region is called the event horizon. Name these objects which may emit Hawking radiation but otherwise do not allow anything to escape, not even light.
Output (English): Science