  The Editors of \emph{Viewpoint} requested a brief report on Norman
G\"urlebeck's recent results \cite{1} concerning black holes in astrophysical
environments. The first draft I wrote assumed knowledge of general relativity
at the level of a graduate-level course. But it was significantly simplified to
make the final version \cite{viewpoint} accessible to undergraduates who are
not familiar with general relativity. This submission to arXiv contains the
first version that is likely to be more helpful to beginning researchers who
are interested in black holes.
