Even the Moon should harbor crashed comet micro black holes with possible gravity lighthouse effects on earth!!
According to Quantum FFF Theory.
A clear challenge for the new LIGO plant at Pisa (Italy)
see also 16 october 2017. ESO news.
Below: Temporary spokes of the rings of Saturn, created by pensil gravity lighthouse effect of aligned internal micro black holes of former crashed comets, just as sunspots are assumed to be formed.