– 20 – 0 20 40 60 80 100 -6 -4 -2 0 Fig. 6.— Log of the probability of detecting a neutron star or black hole lensing event versus the orbital period. As with transits, these events would repeat on a periodic basis as the neutron star or black hole executes an orbit around the star monitored by Kepler . Kepler could detect a handful of events caused by compact objects more massive than white dwarfs.