Abstract

The extension of the idea of local time used on the Earth to the entire solar system is proposed. It is shown how the relative local time in the solar system depends on the observer velocity. The corresponding relative local velocity is defined. The product of such a velocity and a local time interval is required to provide the classical relative distance. Presented formulae for the planetary Local Time Theory (LTT) are compared to those of Special Relativity Theory (SRT). It is shown that the proper time for a moving object defined by Minkowski amounts to the geometrical mean of two local times for two objects moving with velocities of two different orientations. It is shown that in SRT the relative distance between two observers A and B moving with different velocities depends on, which one of two is formally considered as an observer. It is proposed to consider LTT as an alternative to SRT.