  Recent discovery of the rate of expansion of the Universe (Reiss A.G. et al.,
1998; Perlimutter S. et al., 1999) is connected with the vacuum energy in space
which, in turn, can be considered (Gliner E.B., 1965) as the cosmological
constant in Einstein's equation. In this article the cosmological term
predicted by Einstein is interpreted in terms of World's mass required by
Mach's principle. The Mach's principle itself is formulated as follows: inertia
masses of bodies, including those of fundamental particles, are determined by
the value of the cosmological term.
