  Stars that are collapsing toward forming a black hole but appear frozen near
their Schwarzschild horizon are termed "black stars". The collision of two
black stars leads to gravitational radiation during the merging phase followed
by a delayed gamma ray burst during coalescence. The recent observation of
gravitational waves by LIGO, followed by a possible gamma ray counterpart by
Fermi, suggests that the source may have been a merger of two black stars with
profound implications for quantum gravity and the nature of black holes.
