  Energy production due to the Casimir effect is considered for the case of a
superdense state of matter, which can appear in such cosmological objects as
white dwarfs, neutron stars, quasars and so on. The energy output produced by
the Casimir effect during the creation of a neutron star turns out to be
sufficient to explain nova and supernova explosions. It is shown that the
Casimir effect might be a possible source of the huge energy output of quasars.
