It was already mentioned in the introduction of this presentation, that in the following the Theory of Special
Relativity will be placed first in an axiomatic way to discuss general physical relationships. Using this basis,
different combinations of the exchange of signals between two observers will be examined first. This will start
with point-shaped observers before they will be looked at as containing an extended space. Subsequently the relations
of angles between moving observers during the exchange of signals will be investigated.
The consequences derived will be discussed and compared with observations and calculations of the literature.
It will be shown, that the results do not contain any contradictions. Furthermore, additional considerations
concerning the calculations of angles will be derived. These are based on geometric calculations and lead first
to the expected result that a defined contraction of space must exist. It is also shown, that
the contraction has to be considered as symmetric in moving direction and opposite to it. This will become important
for the examination of alternative theories, which will be discussed in chapter 11.1.
Following the historical development, the paticipating observers will be first specified as
“at rest” and “moved”. In further considerations it will become clear, that these definitions in general can be
replaced by “relatively moving against each other”.