Resumen de Black hole horizon is only fiery for you
The horizon of a black hole can either be smooth empty space or a blazing wall of fire. It all depends on one's point of view. Now, Werner Israel and Karun Thanjavur of the University of Victoria in British Columbia, Canada, argue that one can see a firewall from near the horizon--but it's caused by something completely different. In order to stay put at a black hole's horizon, one needs to keep accelerating away from it. A phenomenon called the Unruh effect says that acceleration makes the empty space seem to heat up. Accelerating away from a solar mass black hole, this temperature can be as high as 10^sup 10^ kelvin, says Israel. But to a distant observer, the Hawking radiation is of extremely low energy. Israel says this makes it impossible for the particles to be entangled in either case.
