Scientists at Towson University and the Johns Hopkins University are reporting a new way to peer through the event horizons around black holes and visualize what lies beneath. Their results could rewrite conventional ideas approximately the internal structure of spinning black holes. Current approaches use special coordinate systems in which this structure appears fairly simple,but quantities that depend on an observer's choice of coordinates can give a distorted view of reality, as anyone knows who has compared the size of Greenland and the USA on a map.
Source: phys.org