From Richard Grimmer, Trowbridge, Wiltshire, UK
Are gravastars, electroweak stars, boson stars and fuzzballs really needed to do away with singularities?
From our perspective, standing beyond the black hole, gravitational time dilation means that anything that falls into it slows down as it approaches the event horizon and takes an infinite amount of time to actually reach it. So, from the exterior point of view, the material falling into a black hole never crosses the event horizon.
Meanwhile, black holes are believed to emit Hawking radiation and “evaporate” over a very long, but nonetheless finite, time. If matter takes infinite time to enter, but finite time to leave a black hole, then the singularity never forms.
