  Considering the hyperbolic nature of the universe, the Hubble's law and the
inverse square laws such as, the Coulomb's law and Newton's gravitational law,
should be modified in accordance with the special theory of relativity.
Consequently there is no the Hubble's length, which might be the observable
boundary of our universe, does not appear in point of view of the special
theory of relativity, and the Newton's third law still hold in the special
theory of relativity. Recent astronomical observations of type Ia supernovae
support the modified Hubble's law which also leads a view that the cosmic
microwave might come from extra-universes.
