  The long-standing issues of determination of the mass distribution and nature
of the center of our Galaxy could be probed by a lensing experiment capable of
testing the spatial and velocity distributions of stars nearby and beyond it.
We propose a lensing toy-model which could be a further evidence that a massive
condensation (eg a neutrino condensation) is a good candidate to explain the
data ruling out the presence of a supermassive black hole.
