  If primordial low-mass black holes (PBH) exist in the Universe than many of
stars and planetary bodies appear to be infected by them. This is also true in
regard to the Sun and likely Jupiter and Saturn. The availability of even the
very low-mass inner relativistic reactor may lead to essential changes in
evolution scenario of a celestial body on its lifetime scale. Black holes in
stellar interior may be found either in consequence of captures process or
incorporation during the formation of a star from interstellar clouds.
Surprisingly that in the equilibrium state a PBH growth is a long-lived process
with e-folding rise time of billion years. One can envision a PBH orbiting
inside the Sun. Our considerations showed that the PBH experiences very little
friction in passing through the stellar matter. If the BH mass is above
10^{-5}M_{sun} the major contribution to the luminosity comes from the
relativistic gravitational reactor. In such a case a star evolves towards the
Eddington limit. This should lead to considerable expansion of a star and a
global stability loss. Microscopic PBHs can exist in the interior of planetary
bodies too. To produce the required excess of thermal energy on Jupiter and
Saturn the masses of PBH captured are assumed to be reached of 4 10^{19} and 7
10^{18} g, respectively. These microscopic objects are comparable to the
hydrogen atom in size. One can envision even a planet with the PBH acting as
the self-sufficient source of heating. Such a planet does not need a sun to
maintain animal life on its surface. This may last eons.
