Kip Thorne won a bet about Cygnus X-1 being one of these objects, and Jacob Bekenstein first raised their namesake information paradox.
The region within one of these objects is a ball of strings according to Mathur's fuzzball theory. According to a paper by a group called AMPS, these objects are surrounded by a highly energetic region called a firewall. Kip Thorne won a bet about Cygnus X-1 being one of these objects, and Jacob Bekenstein first raised their namesake information paradox. Energy could be extracted from a rotating one of these objects in the Penrose process. The particles emitted by them are known as Hawking radiation. For 10 points, name these objects from which light cannot escape.
The region within one of these objects is a ball of strings according to Mathur's fuzzball theory.
black holes 