  We point out serious shortcomings of a very recent article (Iorio in
Astrophys. Space Sci. 364:126, 2019) wrongly claiming that the current
precision with which we know orbits of planets in the Solar System rules out
the possibility of gravitational polarization of the quantum vacuum. The main
mistake is that the Sun and a planet are considered as an isolated binary
system completely neglecting the existence of other planets and their crucial
contribution to the gravitational polarization of the quantum vacuum.
