  An impact of a nonzero neutrino millicharge in astrophysics is tested. It is
shown that in astrophysical environments electromagnetic interactions of the
neutrino millicharge with strong electromagnetic fields as well as weak
interactions of the neutrinos with dense background matter can produce new
phenomena accessible for astrophysical observations. On this basis a new limit
on the neutrino millicharge $q_0<1.3\times10^{-19}e_0$ is obtained. This limit
is among the strongest astrophysical constraint on the neutrino millicharge.
Some other possible applications of the obtained results to astrophysics are
discussed in details.
