Black-hole physics
The Ergosphere
The region just outside the event horizon of a rotating (Kerr) black hole where spacetime itself is dragged around so fast that nothing can stay still relative to the distant stars. Energy can, in principle, be extracted from a black hole's rotation here through the Penrose process. A non-rotating black hole has no ergosphere.
Highlights
- ›Where spacetime is dragged around a spinning black hole
Classes, physics & objects
Knowledge connections
- Associated withBlack Hole
- Associated withThe Event Horizon
- Associated withFrame-Dragging
Sources
The primary and reference sources this topic draws on.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.